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  • XNA Screen Manager problem with transitions

    - by NexAddo
    I'm having issues using the game statemanagement example in the game I am developing. I have no issues with my first three screens transitioning between one another. I have a main menu screen, a splash screen and a high score screen that cycle: mainMenuScreen->splashScreen->highScoreScreen->mainMenuScreen The screens change every 15 seconds. Transition times public MainMenuScreen() { TransitionOnTime = TimeSpan.FromSeconds(0.5); TransitionOffTime = TimeSpan.FromSeconds(0.0); currentCreditAmount = Global.CurrentCredits; } public SplashScreen() { TransitionOnTime = TimeSpan.FromSeconds(0.5); TransitionOffTime = TimeSpan.FromSeconds(0.5); } public HighScoreScreen() { TransitionOnTime = TimeSpan.FromSeconds(0.5); TransitionOffTime = TimeSpan.FromSeconds(0.5); } public GamePlayScreen() { TransitionOnTime = TimeSpan.FromSeconds(0.5); TransitionOffTime = TimeSpan.FromSeconds(0.5); } When a user inserts credits they can play the game after pressing start mainMenuScreen->splashScreen->highScoreScreen->(loops forever) || || || ===========Credits In============= || Start || \/ LoadingScreen || Start || \/ GamePlayScreen During each of these transitions, between screens, the same code is used, which exits(removes) all current active screens and respects transitions, then adds the new screen to the screen manager: foreach (GameScreen screen in ScreenManager.GetScreens()) screen.ExitScreen(); //AddScreen takes a new screen to manage and the controlling player ScreenManager.AddScreen(new NameOfScreenHere(), null); Each screen is removed from the ScreenManager with ExitScreen() and using this function, each screen transition is respected. The problem I am having is with my gamePlayScreen. When the current game is finished and the transition is complete for the gamePlayScreen, it should be removed and the next screens should be added to the ScreenManager. GamePlayScreen Code Snippet private void FinishCurrentGame() { AudioManager.StopSounds(); this.UnloadContent(); if (Global.SaveDevice.IsReady) Stats.Save(); if (HighScoreScreen.IsInHighscores(timeLimit)) { foreach (GameScreen screen in ScreenManager.GetScreens()) screen.ExitScreen(); Global.TimeRemaining = timeLimit; ScreenManager.AddScreen(new BackgroundScreen(), null); ScreenManager.AddScreen(new MessageBoxScreen("Enter your Initials", true), null); } else { foreach (GameScreen screen in ScreenManager.GetScreens()) screen.ExitScreen(); ScreenManager.AddScreen(new BackgroundScreen(), null); ScreenManager.AddScreen(new MainMenuScreen(), null); } } The problem is that when isExiting is set to true by screen.ExitScreen() for the gamePlayScreen, the transition never completes the transition and removes the screen from the ScreenManager. Every other screen that I use the same technique to add and remove each screen fully transitions On/Off and is removed at the appropriate time from the ScreenManager, but noy my GamePlayScreen. Has anyone that has used the GameStateManagement example experienced this issue or can someone see the mistake I am making? EDIT This is what I tracked down. When the game is done, I call foreach (GameScreen screen in ScreenManager.GetScreens()) screen.ExitScreen(); to start the transition off process for the gameplay screen. At this point there is only 1 screen on the ScreenManager stack. The gamePlay screen gets isExiting set to true and starts to transition off. Right after the above call to ExitScreen() I add a background screen and menu screen to the screenManager: ScreenManager.AddScreen(new background(), null); ScreenManager.AddScreen(new Menu(), null); The count of the ScreenManager is now 3. What I noticed while stepping through the updates for GameScreen and ScreenManager, the gameplay screen never gets to the point where the transistion process finishes so the ScreenManager can remove it from the stack. This anomaly does not happen to any of my other screens when I switch between them. Screen Manager Code #region File Description //----------------------------------------------------------------------------- // ScreenManager.cs // // Microsoft XNA Community Game Platform // Copyright (C) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- #endregion #define DEMO #region Using Statements using System; using System.Diagnostics; using System.Collections.Generic; using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Content; using Microsoft.Xna.Framework.Graphics; using PerformanceUtility.GameDebugTools; #endregion namespace GameStateManagement { /// <summary> /// The screen manager is a component which manages one or more GameScreen /// instances. It maintains a stack of screens, calls their Update and Draw /// methods at the appropriate times, and automatically routes input to the /// topmost active screen. /// </summary> public class ScreenManager : DrawableGameComponent { #region Fields List<GameScreen> screens = new List<GameScreen>(); List<GameScreen> screensToUpdate = new List<GameScreen>(); InputState input = new InputState(); SpriteBatch spriteBatch; SpriteFont font; Texture2D blankTexture; bool isInitialized; bool getOut; bool traceEnabled; #if DEBUG DebugSystem debugSystem; Stopwatch stopwatch = new Stopwatch(); bool debugTextEnabled; #endif #endregion #region Properties /// <summary> /// A default SpriteBatch shared by all the screens. This saves /// each screen having to bother creating their own local instance. /// </summary> public SpriteBatch SpriteBatch { get { return spriteBatch; } } /// <summary> /// A default font shared by all the screens. This saves /// each screen having to bother loading their own local copy. /// </summary> public SpriteFont Font { get { return font; } } public Rectangle ScreenRectangle { get { return new Rectangle(0, 0, GraphicsDevice.Viewport.Width, GraphicsDevice.Viewport.Height); } } /// <summary> /// If true, the manager prints out a list of all the screens /// each time it is updated. This can be useful for making sure /// everything is being added and removed at the right times. /// </summary> public bool TraceEnabled { get { return traceEnabled; } set { traceEnabled = value; } } #if DEBUG public bool DebugTextEnabled { get { return debugTextEnabled; } set { debugTextEnabled = value; } } public DebugSystem DebugSystem { get { return debugSystem; } } #endif #endregion #region Initialization /// <summary> /// Constructs a new screen manager component. /// </summary> public ScreenManager(Game game) : base(game) { // we must set EnabledGestures before we can query for them, but // we don't assume the game wants to read them. //TouchPanel.EnabledGestures = GestureType.None; } /// <summary> /// Initializes the screen manager component. /// </summary> public override void Initialize() { base.Initialize(); #if DEBUG debugSystem = DebugSystem.Initialize(Game, "Fonts/MenuFont"); #endif isInitialized = true; } /// <summary> /// Load your graphics content. /// </summary> protected override void LoadContent() { // Load content belonging to the screen manager. ContentManager content = Game.Content; spriteBatch = new SpriteBatch(GraphicsDevice); font = content.Load<SpriteFont>(@"Fonts\menufont"); blankTexture = content.Load<Texture2D>(@"Textures\Backgrounds\blank"); // Tell each of the screens to load their content. foreach (GameScreen screen in screens) { screen.LoadContent(); } } /// <summary> /// Unload your graphics content. /// </summary> protected override void UnloadContent() { // Tell each of the screens to unload their content. foreach (GameScreen screen in screens) { screen.UnloadContent(); } } #endregion #region Update and Draw /// <summary> /// Allows each screen to run logic. /// </summary> public override void Update(GameTime gameTime) { #if DEBUG debugSystem.TimeRuler.StartFrame(); debugSystem.TimeRuler.BeginMark("Update", Color.Blue); if (debugTextEnabled && getOut == false) { debugSystem.FpsCounter.Visible = true; debugSystem.TimeRuler.Visible = true; debugSystem.TimeRuler.ShowLog = true; getOut = true; } else if (debugTextEnabled == false) { getOut = false; debugSystem.FpsCounter.Visible = false; debugSystem.TimeRuler.Visible = false; debugSystem.TimeRuler.ShowLog = false; } #endif // Read the keyboard and gamepad. input.Update(); // Make a copy of the master screen list, to avoid confusion if // the process of updating one screen adds or removes others. screensToUpdate.Clear(); foreach (GameScreen screen in screens) screensToUpdate.Add(screen); bool otherScreenHasFocus = !Game.IsActive; bool coveredByOtherScreen = false; // Loop as long as there are screens waiting to be updated. while (screensToUpdate.Count > 0) { // Pop the topmost screen off the waiting list. GameScreen screen = screensToUpdate[screensToUpdate.Count - 1]; screensToUpdate.RemoveAt(screensToUpdate.Count - 1); // Update the screen. screen.Update(gameTime, otherScreenHasFocus, coveredByOtherScreen); if (screen.ScreenState == ScreenState.TransitionOn || screen.ScreenState == ScreenState.Active) { // If this is the first active screen we came across, // give it a chance to handle input. if (!otherScreenHasFocus) { screen.HandleInput(input); otherScreenHasFocus = true; } // If this is an active non-popup, inform any subsequent // screens that they are covered by it. if (!screen.IsPopup) coveredByOtherScreen = true; } } // Print debug trace? if (traceEnabled) TraceScreens(); #if DEBUG debugSystem.TimeRuler.EndMark("Update"); #endif } /// <summary> /// Prints a list of all the screens, for debugging. /// </summary> void TraceScreens() { List<string> screenNames = new List<string>(); foreach (GameScreen screen in screens) screenNames.Add(screen.GetType().Name); Debug.WriteLine(string.Join(", ", screenNames.ToArray())); } /// <summary> /// Tells each screen to draw itself. /// </summary> public override void Draw(GameTime gameTime) { #if DEBUG debugSystem.TimeRuler.StartFrame(); debugSystem.TimeRuler.BeginMark("Draw", Color.Yellow); #endif foreach (GameScreen screen in screens) { if (screen.ScreenState == ScreenState.Hidden) continue; screen.Draw(gameTime); } #if DEBUG debugSystem.TimeRuler.EndMark("Draw"); #endif #if DEMO SpriteBatch.Begin(); SpriteBatch.DrawString(font, "DEMO - NOT FOR RESALE", new Vector2(20, 80), Color.White); SpriteBatch.End(); #endif } #endregion #region Public Methods /// <summary> /// Adds a new screen to the screen manager. /// </summary> public void AddScreen(GameScreen screen, PlayerIndex? controllingPlayer) { screen.ControllingPlayer = controllingPlayer; screen.ScreenManager = this; screen.IsExiting = false; // If we have a graphics device, tell the screen to load content. if (isInitialized) { screen.LoadContent(); } screens.Add(screen); } /// <summary> /// Removes a screen from the screen manager. You should normally /// use GameScreen.ExitScreen instead of calling this directly, so /// the screen can gradually transition off rather than just being /// instantly removed. /// </summary> public void RemoveScreen(GameScreen screen) { // If we have a graphics device, tell the screen to unload content. if (isInitialized) { screen.UnloadContent(); } screens.Remove(screen); screensToUpdate.Remove(screen); } /// <summary> /// Expose an array holding all the screens. We return a copy rather /// than the real master list, because screens should only ever be added /// or removed using the AddScreen and RemoveScreen methods. /// </summary> public GameScreen[] GetScreens() { return screens.ToArray(); } /// <summary> /// Helper draws a translucent black fullscreen sprite, used for fading /// screens in and out, and for darkening the background behind popups. /// </summary> public void FadeBackBufferToBlack(float alpha) { Viewport viewport = GraphicsDevice.Viewport; spriteBatch.Begin(); spriteBatch.Draw(blankTexture, new Rectangle(0, 0, viewport.Width, viewport.Height), Color.Black * alpha); spriteBatch.End(); } #endregion } } Game Screen Parent of GamePlayScreen #region File Description //----------------------------------------------------------------------------- // GameScreen.cs // // Microsoft XNA Community Game Platform // Copyright (C) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- #endregion #region Using Statements using System; using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Input; //using Microsoft.Xna.Framework.Input.Touch; using System.IO; #endregion namespace GameStateManagement { /// <summary> /// Enum describes the screen transition state. /// </summary> public enum ScreenState { TransitionOn, Active, TransitionOff, Hidden, } /// <summary> /// A screen is a single layer that has update and draw logic, and which /// can be combined with other layers to build up a complex menu system. /// For instance the main menu, the options menu, the "are you sure you /// want to quit" message box, and the main game itself are all implemented /// as screens. /// </summary> public abstract class GameScreen { #region Properties /// <summary> /// Normally when one screen is brought up over the top of another, /// the first screen will transition off to make room for the new /// one. This property indicates whether the screen is only a small /// popup, in which case screens underneath it do not need to bother /// transitioning off. /// </summary> public bool IsPopup { get { return isPopup; } protected set { isPopup = value; } } bool isPopup = false; /// <summary> /// Indicates how long the screen takes to /// transition on when it is activated. /// </summary> public TimeSpan TransitionOnTime { get { return transitionOnTime; } protected set { transitionOnTime = value; } } TimeSpan transitionOnTime = TimeSpan.Zero; /// <summary> /// Indicates how long the screen takes to /// transition off when it is deactivated. /// </summary> public TimeSpan TransitionOffTime { get { return transitionOffTime; } protected set { transitionOffTime = value; } } TimeSpan transitionOffTime = TimeSpan.Zero; /// <summary> /// Gets the current position of the screen transition, ranging /// from zero (fully active, no transition) to one (transitioned /// fully off to nothing). /// </summary> public float TransitionPosition { get { return transitionPosition; } protected set { transitionPosition = value; } } float transitionPosition = 1; /// <summary> /// Gets the current alpha of the screen transition, ranging /// from 1 (fully active, no transition) to 0 (transitioned /// fully off to nothing). /// </summary> public float TransitionAlpha { get { return 1f - TransitionPosition; } } /// <summary> /// Gets the current screen transition state. /// </summary> public ScreenState ScreenState { get { return screenState; } protected set { screenState = value; } } ScreenState screenState = ScreenState.TransitionOn; /// <summary> /// There are two possible reasons why a screen might be transitioning /// off. It could be temporarily going away to make room for another /// screen that is on top of it, or it could be going away for good. /// This property indicates whether the screen is exiting for real: /// if set, the screen will automatically remove itself as soon as the /// transition finishes. /// </summary> public bool IsExiting { get { return isExiting; } protected internal set { isExiting = value; } } bool isExiting = false; /// <summary> /// Checks whether this screen is active and can respond to user input. /// </summary> public bool IsActive { get { return !otherScreenHasFocus && (screenState == ScreenState.TransitionOn || screenState == ScreenState.Active); } } bool otherScreenHasFocus; /// <summary> /// Gets the manager that this screen belongs to. /// </summary> public ScreenManager ScreenManager { get { return screenManager; } internal set { screenManager = value; } } ScreenManager screenManager; public KeyboardState KeyboardState { get {return Keyboard.GetState();} } /// <summary> /// Gets the index of the player who is currently controlling this screen, /// or null if it is accepting input from any player. This is used to lock /// the game to a specific player profile. The main menu responds to input /// from any connected gamepad, but whichever player makes a selection from /// this menu is given control over all subsequent screens, so other gamepads /// are inactive until the controlling player returns to the main menu. /// </summary> public PlayerIndex? ControllingPlayer { get { return controllingPlayer; } internal set { controllingPlayer = value; } } PlayerIndex? controllingPlayer; /// <summary> /// Gets whether or not this screen is serializable. If this is true, /// the screen will be recorded into the screen manager's state and /// its Serialize and Deserialize methods will be called as appropriate. /// If this is false, the screen will be ignored during serialization. /// By default, all screens are assumed to be serializable. /// </summary> public bool IsSerializable { get { return isSerializable; } protected set { isSerializable = value; } } bool isSerializable = true; #endregion #region Initialization /// <summary> /// Load graphics content for the screen. /// </summary> public virtual void LoadContent() { } /// <summary> /// Unload content for the screen. /// </summary> public virtual void UnloadContent() { } #endregion #region Update and Draw /// <summary> /// Allows the screen to run logic, such as updating the transition position. /// Unlike HandleInput, this method is called regardless of whether the screen /// is active, hidden, or in the middle of a transition. /// </summary> public virtual void Update(GameTime gameTime, bool otherScreenHasFocus, bool coveredByOtherScreen) { this.otherScreenHasFocus = otherScreenHasFocus; if (isExiting) { // If the screen is going away to die, it should transition off. screenState = ScreenState.TransitionOff; if (!UpdateTransition(gameTime, transitionOffTime, 1)) { // When the transition finishes, remove the screen. ScreenManager.RemoveScreen(this); } } else if (coveredByOtherScreen) { // If the screen is covered by another, it should transition off. if (UpdateTransition(gameTime, transitionOffTime, 1)) { // Still busy transitioning. screenState = ScreenState.TransitionOff; } else { // Transition finished! screenState = ScreenState.Hidden; } } else { // Otherwise the screen should transition on and become active. if (UpdateTransition(gameTime, transitionOnTime, -1)) { // Still busy transitioning. screenState = ScreenState.TransitionOn; } else { // Transition finished! screenState = ScreenState.Active; } } } /// <summary> /// Helper for updating the screen transition position. /// </summary> bool UpdateTransition(GameTime gameTime, TimeSpan time, int direction) { // How much should we move by? float transitionDelta; if (time == TimeSpan.Zero) transitionDelta = 1; else transitionDelta = (float)(gameTime.ElapsedGameTime.TotalMilliseconds / time.TotalMilliseconds); // Update the transition position. transitionPosition += transitionDelta * direction; // Did we reach the end of the transition? if (((direction < 0) && (transitionPosition <= 0)) || ((direction > 0) && (transitionPosition >= 1))) { transitionPosition = MathHelper.Clamp(transitionPosition, 0, 1); return false; } // Otherwise we are still busy transitioning. return true; } /// <summary> /// Allows the screen to handle user input. Unlike Update, this method /// is only called when the screen is active, and not when some other /// screen has taken the focus. /// </summary> public virtual void HandleInput(InputState input) { } public KeyboardState currentKeyState; public KeyboardState lastKeyState; public bool IsKeyHit(Keys key) { if (currentKeyState.IsKeyDown(key) && lastKeyState.IsKeyUp(key)) return true; return false; } /// <summary> /// This is called when the screen should draw itself. /// </summary> public virtual void Draw(GameTime gameTime) { } #endregion #region Public Methods /// <summary> /// Tells the screen to serialize its state into the given stream. /// </summary> public virtual void Serialize(Stream stream) { } /// <summary> /// Tells the screen to deserialize its state from the given stream. /// </summary> public virtual void Deserialize(Stream stream) { } /// <summary> /// Tells the screen to go away. Unlike ScreenManager.RemoveScreen, which /// instantly kills the screen, this method respects the transition timings /// and will give the screen a chance to gradually transition off. /// </summary> public void ExitScreen() { if (TransitionOffTime == TimeSpan.Zero) { // If the screen has a zero transition time, remove it immediately. ScreenManager.RemoveScreen(this); } else { // Otherwise flag that it should transition off and then exit. isExiting = true; } } #endregion #region Helper Methods /// <summary> /// A helper method which loads assets using the screen manager's /// associated game content loader. /// </summary> /// <typeparam name="T">Type of asset.</typeparam> /// <param name="assetName">Asset name, relative to the loader root /// directory, and not including the .xnb extension.</param> /// <returns></returns> public T Load<T>(string assetName) { return ScreenManager.Game.Content.Load<T>(assetName); } #endregion } }

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  • Screen Scraping - how to get AJAX based filtered data

    - by Muhammad Akhtar
    hi, I am working on screen scraping, its easy when filteration in query string, but the problem in AJAX based filteration, e.g. here is an sample URL When you open this page, enter hotel name and click Go, Ajax filter work and show the result accordingly or you click on Next Page, it will shown next record using AJAX based. please suggest me, how to handle these kind of issues when working in Screen Scraping? Thank alot

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  • Screen (command-line program) bug?

    - by VioletCrime
    fired up my Minecraft server again after about a year off. My server used to run 11.04, which has since been upgraded to 12.04; I lost my management scripts in the upgrade (thought I'd backed up the user's home directory), but whatever, I enjoy developing stuff like that anyways. However, this time around, I'm running into issues. I start the Minecraft server using a detached screen, however the script is unable to 'stuff' commands into the screen instance until I attach to the screen then detach again? Once I do that, I can stuff anything I want into the server's terminal using the -X option, until I stop/start the server again, then I have to reattach and detach in order to restore functionality? Here's the manager script: #!/bin/bash #Name of the screen housing the server (set with the -S flag at startup) SCREENNAME=minecraft1 #Name of the folder housing the Minecraft world FOLDERNAME=world1 startServer (){ if screen -list | grep "$SCREENNAME" > /dev/null then echo "Cannot start Minecraft server; it is already running!" else screen -dmS $SCREENNAME java -Xmx1024M -Xms1024M -jar minecraft_server.jar sleep 2 if screen -list | grep "$SCREENNAME" > /dev/null then echo "Minecraft server started; happy mining!" else echo "ERROR: Minecraft server failed to start!" fi fi; } stopServer (){ if screen -list | grep "$SCREENNAME" > /dev/null then echo "Server is running. Giving a 1-minute warning." screen -S $SCREENNAME -X stuff "/say Shutting down (halt) in one minute." screen -S $SCREENNAME -X stuff $'\015' sleep 45 screen -S $SCREENNAME -X stuff "/say Shutting down (halt) in 15 seconds." screen -S $SCREENNAME -X stuff $'\015' sleep 15 screen -S $SCREENNAME -X stuff "/stop" screen -S $SCREENNAME -X stuff $'\015' else echo "Server is not running; nothing to stop." fi; } stopServerNow (){ if screen -list | grep "$SCREENNAME" > /dev/null then echo "Server is running. Giving a 5-second warning." screen -S $SCREENNAME -X stuff "/say EMERGENCY SHUTDOWN! 5 seconds to halt." screen -S $SCREENNAME -X stuff $'\015' sleep 5 screen -S $SCREENNAME -X stuff "/stop" screen -S $SCREENNAME -X stuff $'\015' else echo "Server is not running; nothing to stop." fi; } restartServer (){ if screen -list | grep "$SCREENNAME" > /dev/null then echo "Server is running. Giving a 1-minute warning." screen -S $SCREENNAME -X stuff "/say Shutting down (restart) in one minute." screen -S $SCREENNAME -X stuff $'\015' sleep 45 screen -S $SCREENNAME -X stuff "/say Shutting down (restart) in 15 seconds." screen -S $SCREENNAME -X stuff $'\015' sleep 15 screen -S $SCREENNAME -X stuff "/stop" screen -S $SCREENNAME -X stuff $'\015' sleep 2 startServer else echo "Cannot restart server: it isn't running." fi; } #In order for this function to work, a directory 'backup/$FOLDERNAME' must exist in the same #directory that '$FOLDERNAME' resides backupWorld (){ if screen -list | grep "$SCREENNAME" > /dev/null then echo "Server is running. Giving a 1-minute warning." screen -S $SCREENNAME -X stuff "/say Shutting down (backup) in one minute." screen -S $SCREENNAME -X stuff $'\015' screen -S $SCREENNAME -X stuff "/say Server should be down for no more than a few seconds." screen -S $SCREENNAME -X stuff $'\015' sleep 45 screen -S $SCREENNAME -X stuff "/say Shutting down for backup in 15 seconds." screen -S $SCREENNAME -X stuff $'\015' sleep 15 screen -S $SCREENNAME -X stuff "/stop" screen -S $SCREENNAME -X stuff $'\015' fi sleep 2 if screen -list | grep $SCREENNAME > /dev/null then echo "Server is still running? Error." else cd .. tar -czvf backup0.tar.gz $FOLDERNAME mv backup0.tar.gz backup/$FOLDERNAME cd backup/$FOLDERNAME rm backup10.tar.gz mv backup9.tar.gz backup10.tar.gz mv backup8.tar.gz backup9.tar.gz mv backup7.tar.gz backup8.tar.gz mv backup6.tar.gz backup7.tar.gz mv backup5.tar.gz backup6.tar.gz mv backup4.tar.gz backup5.tar.gz mv backup3.tar.gz backup4.tar.gz mv backup2.tar.gz backup3.tar.gz mv backup1.tar.gz backup2.tar.gz mv backup0.tar.gz backup1.tar.gz cd ../../$FOLDERNAME screen -dmS $SCREENNAME java -Xmx1024M -Xms1024M -jar minecraft_server.jar; sleep 2 if screen -list | grep "$SCREENNAME" > /dev/null then echo "Minecraft server restarted; happy mining!" else echo "ERROR: Minecraft server failed to start!" fi fi; } printCommands (){ echo echo "$0 usage:" echo echo "Start : Starts the server on a detached screen." echo "Stop : Stop the server; includes a 1-minute warning." echo "StopNOW : Stops the server with only a 5-second warning." echo "Restart : Stops the server and starts the server again." echo "Backup : Stops the server (1 min), backs up the world, and restarts." echo "Help : Display this message." } #Forces case-insensitive string comparisons shopt -s nocasematch #Primary 'Switch' if [[ $1 = "start" ]] then startServer elif [[ $1 = "stop" ]] then stopServer elif [[ $1 = "stopnow" ]] then stopServerNow elif [[ $1 = "backup" ]] then backupWorld elif [[ $1 = "restart" ]] then restartServer else printCommands fi

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  • monitoring changes in windows of screen while screen is detached

    - by gojira
    It is possible to monitor windows in screen (I mean the terminal multiplexer called screen) with Ctrl-a M. However, I am only aware of the notification when I am looking at any window. What I want, though, is to somehow also be notified if the screen in question has been detached with Ctrl-a d. I.e., I issue the command to monitor a window in screen, then detach that screen, now I want to get a notification if the monitor detects activity, in some form (a string in the bash I'm using, or an email, or anything). Is this possible, and if yes how?

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  • Rendering another screen on top of main game screen in fullscreen mode

    - by wolf
    my game runs in fullscreen mode and uses active rendering. The graphics are drawn on the fullscreen window in each game loop: public void render() { Window w = screen.getFullScreenWindow(); Graphics2D g = screen.getGraphics(); renderer.render(g, level, w.getWidth(), w.getHeight()); g.dispose(); screen.update(); } This is the screen.update() method: public void update(){ Window w = device.getFullScreenWindow(); if(w != null){ BufferStrategy s = w.getBufferStrategy(); if(!s.contentsLost()){ s.show(); } } } I want to display another screen on my main game screen (menu, inventory etc). Lets say I have a JPanel inventory, which has a grid of inventory cells (manually drawn) and some Swing components like JPopupMenu. So i tried adding that to my window and repainting it in the game loop, which worked okay most of the time... but sometimes the panel wouldn't get displayed. Blindly moving things around in the inventory worked, but it just didn't display. When i alt-tabbed out and back again, it displayed properly. I also tried drawing the rest of the inventory on my full screen window and using a JPanel to display only the buttons and popupmenus. The inventory displayed properly, but the Swing components keep flickering. I'm guessing this is because I don't know how to combine active and passive rendering. public void render() { Graphics2D g = screen.getGraphics(); invManager.render(g); g.dispose(); screen.update(); invPanel.repaint(); } Should i use something else instead of a JPanel? I don't really need active rendering for these screens, but I don't understand why they sometimes just don't display. Or maybe I should just make my own custom components instead of using Swing? I also read somewhere that using multiple panels/frames in a game is bad practice so should I draw everything on one window/frame/panel? If I CAN use JPanels for this, should I add and remove them every time the inventory is toggled? Or just change their visibility?

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  • PHP Screen Scraping Class

    - by BRADINO
    After some positive feedback I have decided to continue to develop the PHP Screen Scraping class. This post will server as the permanent home for the class. Download PHP Screen Scraping Class Updates 20009-07-30 Added setHeader() function

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  • CAPTCHA blocking for my scraping script?

    - by Surabhil Sergy
    I am working on a scraping project which involves getting web data and parsing them for further use. I have been working using PHP and CURL to make scraping scripts which crawls web data and I make use of either PHP Dom or Simple HTML DOM Parser library for these kinds of projects. On a recent project I encountered some challenges; initially I found the target website blocked my server IP such that the server could not make any successful requests to the site. Understanding these issues as common I bought a set of private proxies and tried to make request calls using them. Though this could get successful response, I noticed the script is getting some kind of blocks after 2-3 continuous requests. On printing and checking the response I could see a pop-up asking for CAPTCHA validation. I could not see any captcha characters to be entered and it also shows an error “input error: invalid referrer”. On examining the source I could see some Google recaptcha scripts within. I’m stuck at this point and I m not able to execute my script. My script is used for gathering data and it needs to go through a large number of pages periodically over the site. But in the current scenario I am not able to proceed with my script. I could see there are some options to overcome these captcha issues and scraping these kinds of sites too are common. I have been checking my script performance and responses over last two months. I could see during first month I was able to execute very large number of requests from a single IP and I was able to get results. Later I get an IP block and used private proxies which could get me some results. Later I am facing now with the captcha trouble. I would appreciate any help or suggestions in this regard. (Often in this kind of questions I used to get a first comment as, ‘Have you asked for prior permission from the target?’ .I haven’t ,but I know there are many sites doing so to get the details out of sites and target sites may not often give access to them. I respect the legality and scraping etiquettes but I would like to know at what point I stuck and how could I overcome that! ) I could provide any supporting information if needed.

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  • How to let screen time out on sign in screen

    - by Aren Cambre
    I have Ubuntu 13.10 set up on an older PC. If I am logged in as a user, then the screen timeout and power saving mode works as expected. However, if nobody is logged in, the screen never times out, and the monitor stays on all the time with the login screen. How can I adjust Ubuntu 13.10 so that the login screen also times out after a minute or so? I don't want the monitor's power saving mode to be disabled just because nobody is currently logged in.

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  • HP EliteBook 8440p screen flickers after blank screen (nvidia)

    - by fliegenderfrosch
    When my screen turns blank after 10 min or after locking the screen and I begin using the laptop again, the screen is flickering. It looks as if every second line of pixels is blinking and the flickering is mainly present in the upper part of the screen. I am using Ubuntu 12.04 with the latest binary Nvidia drivers (current-updates). lshw | grep VGA tells me: 01:00.0 VGA compatible controller: NVIDIA Corporation GT218 [NVS 3100M] (rev a2) The problem doesn’t occur after sleeping or on an external display. I used Kubuntu 11.10 before, where the problem didn’t occur either. Is there anything I can do except waiting for new drivers?

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  • Screen Corruption in half the screen only

    - by Guy DAmico
    About 50% of the my NATTY desktop screen is corrupted. Once that happens I can re-boot as many times as I want but the problem continues. If I logout and then into WINDOWS for a day I may be successful and boot UBUNTU with a good screen. The desktop is formatted correctly, there's no pixelation, rather there is a fine grained white crosshatch pattern covering the entire screen. If I open any application the screen corruption worsens eventually to the point I can no longer make out anything. I ran ram memory test w/o any errors. I have no display issues when running WINDOWS 7. Any ideas. My computer is a Dual Boot stock DELL 5150 w/3gig of ram an on board video.

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  • 12.04 Black screen with blinking cursor

    - by Junaid
    I have read this post My computer boots to a black screen, what options do I have to fix it? UBUNTU 12.04 works well with livecd but fails to start after complete installation, black screen with a blinking cursor. I tried holding shift key and edit grub options but holding shift did not do anything. I give up, any suggestion. I have built in intel graphics card and an nvidia card in PCI. I have tried by removing nvidia card as well. All I see is a black screen with a blinking cursor. My system is Dell optiplex GX260 with 1GB ram and 2.4 GHz P4 processor

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  • Change the Default Number of Rows of Tiles on the Windows 8 UI (Metro) Screen

    - by Lori Kaufman
    By default, Windows 8 automatically sets the number of rows of tiles to fit your screen, depending on your monitor size and resolution. However, you can tell Windows 8 to display a certain number of rows of tiles at all times, despite the screen resolution. To do this, we will make a change to the registry. If you are not already on the Desktop, click the Desktop tile on the Start screen. NOTE: Before making changes to the registry, be sure you back it up. We also recommend creating a restore point you can use to restore your system if something goes wrong. HTG Explains: Why Do Hard Drives Show the Wrong Capacity in Windows? Java is Insecure and Awful, It’s Time to Disable It, and Here’s How What Are the Windows A: and B: Drives Used For?

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  • Ubuntu black screen and icons messed up 12.04

    - by user69869
    I had a successful install when i updated from 11.10 but when i actually went to start it it hanged and the purple screen for a few seconds then flickered my boot screen then showed the desktop i cant interact its black i can see the icons marked out but no images they are just gray wireless doesnt connect it seems that it messed up all the drivers. i tried to stat the old version i had its the same exept i can interact most window close buttons are missing and most of the time it doesnt know what screen im on. any ideas on what i can do? oh and recovery mode shows alot of errors and doesnt do much i ran it for the old version and it just goes through failing and gives an error beep. Thanks in advance any advice is appreciated (note windows still works fine on this system... unfortunately ;D )

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  • Black & White screen after resuming from Suspend [Ubuntu 12.04]

    - by Rakatash
    I recently thought of giving Linux a try with Ubuntu 12.04. So far I managed to figure out how to troubleshoot and fix some of my older issues. But i wasnt able to find a problem similar to mine. The issue is, whenever my laptop starts up after suspend, the screen stays black for a short while. then after that comes a black and white 8-bit kinda screen with nothing else. I am not sure if it's an issue with the graphic card or not. because I am able to write my login password and proceed normally if i wait till this screen shows up...after that everything is displayed normally. is there a fix for this?

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  • Screen is very dim on an Acer Aspire 6920Z

    - by Justin
    I've been trying to figure this out for a week now, my laptops screen is on and working but you cannot see whats on the screen without shining a flashlight at it. I'm using a spare monitor by the VGA port right now to be able to use this laptop, which is kinda a pain. Been reading around a bit about this problem and it seems to be a common-ish problem it seems. I've tried to change the brightness which doesn't help whats so ever. It just happen one day after I turned off the laptop for the night. The screen flashes on for a bit at start up, then goes completely dim. Anyone with this problem and find a fix? You can search up this computers spec by the name/model in the title if you need hardware info. I never had this problem with the old Ubuntu 10.04.

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  • c# Network Programming - HTTPWebRequest Scraping

    - by masterguru
    Hi, I am building a web scraping application. It should scrape a complex web site with concurrent HttpWebRequests from a single host to a single target web server. The application should run on Windows server 2008. One single HttpWebRequest for data could take from 1 minute to 4 minutes to complete (because of long running db operations) I should have at least 100 parallel requests to the target web server, but i have noticed that when i use more then 2-3 long-running requests i have big performance issues (request timeouts/hanging). How many concurrent requests can i have in this scenario from a single host to a single target web server? can i use Thread Pools in the application to run parallel HttpWebRequests to the server? will i have any issues with the default outbound HTTP connection/requests limits? what about Request timeouts when i reach outbound connection limits? what would be the best setup for my scenario? Any help would be appreciated. Thanks

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  • Facebook fan page photo's scraping

    - by Daan Poron
    Hi, We want to add a facebook fan page photo competition to our fan page. The meaning is that ppl can upload photo's and others can like them. The person with the most likes on his photo wins a price. Now i was wondering if anyone knows a good idea on how to get a snapshot of all the photo's on a given moment. So that when we want to stop the contest we get an overview of the number of likes of all the persons. Some good website scraping tools? maybe a usefull facebook app? some other alternatives? greets, Daan

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  • monitor screen dead.....not even shows bios screen

    - by megatronous
    Re: /host/ubuntu/disks/root.disk does not exist :( ALERT! /host/ubuntu/disks/root.siak does not exist. Dropping to a shell! BusyBox v1.15.3 (Ubuntu 1:1.15.3-1ubuntu5) built-in shell (ash) (initramfs) alll thought the above problem was solved my issue now is..when i booted my pc again after this solving this to solve the above problem i had pressed e in the grub menu then corrected the partition then after starting i did sudo grub-update then i made some automatic update updates then in next reboot......my screen had gone blank .... and i am not even able to see bios screen....in the start ...the monitior just stays blank..................i have even tried disconnectiong my hard disk but still not able to get the display......solution required ....urgently.....

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  • Unity completely broken after upgrade to 12.10?

    - by NlightNFotis
    I am facing a very frustrating issue with my computer right now. I successfully upgraded to Ubuntu 12.10 this afternoon, but after the upgrade, the graphical user interface seems completely broken. To be more specific, I can not get the Unity bar to appear on the right. I have tried many things, including (but not limited to) purging and then reinstalling the fglrx drivers, apt-get install --reinstall ubuntu-desktop, apt-get install --reinstall unity, tried to remove the Xorg and Compiz configurations, checked to see if the Ubuntu Unity wall was enabled (it was) in ccsm, all to no avail. Could someone help me troubleshoot and essentially fix this issue? NOTE: This is the output when I try to enable unity via a terminal: compiz (core) - Info: Loading plugin: core compiz (core) - Info: Starting plugin: core unity-panel-service: no process found compiz (core) - Info: Loading plugin: reset compiz (core) - Error: Failed to load plugin: reset compiz (core) - Info: Loading plugin: ccp compiz (core) - Info: Starting plugin: ccp compizconfig - Info: Backend : gsettings compizconfig - Info: Integration : true compizconfig - Info: Profile : unity compiz (core) - Info: Loading plugin: composite compiz (core) - Info: Starting plugin: composite compiz (core) - Info: Loading plugin: opengl X Error of failed request: BadRequest (invalid request code or no such operation) Major opcode of failed request: 153 (GLX) Minor opcode of failed request: 19 (X_GLXQueryServerString) Serial number of failed request: 22 Current serial number in output stream: 22 compiz (core) - Info: Unity is not supported by your hardware. Enabling software rendering instead (slow). compiz (core) - Info: Starting plugin: opengl Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 compiz (core) - Error: Plugin initScreen failed: opengl compiz (core) - Error: Failed to start plugin: opengl compiz (core) - Info: Unloading plugin: opengl compiz (core) - Info: Loading plugin: decor compiz (core) - Info: Starting plugin: decor compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 compiz (core) - Info: Loading plugin: imgpng compiz (core) - Info: Starting plugin: imgpng compiz (core) - Info: Loading plugin: vpswitch compiz (core) - Info: Starting plugin: vpswitch compiz (core) - Info: Loading plugin: resize compiz (core) - Info: Starting plugin: resize Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 compiz (core) - Info: Loading plugin: compiztoolbox compiz (core) - Info: Starting plugin: compiztoolbox compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Info: Loading plugin: move compiz (core) - Info: Starting plugin: move compiz (core) - Info: Loading plugin: gnomecompat compiz (core) - Info: Starting plugin: gnomecompat compiz (core) - Info: Loading plugin: mousepoll compiz (core) - Info: Starting plugin: mousepoll compiz (core) - Info: Loading plugin: wall compiz (core) - Info: Starting plugin: wall compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Error: Plugin init failed: wall compiz (core) - Error: Failed to start plugin: wall compiz (core) - Info: Unloading plugin: wall compiz (core) - Info: Loading plugin: regex compiz (core) - Info: Starting plugin: regex compiz (core) - Info: Loading plugin: snap compiz (core) - Info: Starting plugin: snap compiz (core) - Info: Loading plugin: unitymtgrabhandles compiz (core) - Info: Starting plugin: unitymtgrabhandles compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Error: Plugin init failed: unitymtgrabhandles compiz (core) - Error: Failed to start plugin: unitymtgrabhandles compiz (core) - Info: Unloading plugin: unitymtgrabhandles compiz (core) - Info: Loading plugin: place compiz (core) - Info: Starting plugin: place compiz (core) - Info: Loading plugin: grid compiz (core) - Info: Starting plugin: grid Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 compiz (core) - Info: Loading plugin: animation compiz (core) - Info: Starting plugin: animation compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Error: Plugin init failed: animation compiz (core) - Error: Failed to start plugin: animation compiz (core) - Info: Unloading plugin: animation compiz (core) - Info: Loading plugin: fade compiz (core) - Info: Starting plugin: fade compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Error: Plugin init failed: fade compiz (core) - Error: Failed to start plugin: fade compiz (core) - Info: Unloading plugin: fade compiz (core) - Info: Loading plugin: session compiz (core) - Info: Starting plugin: session compiz (core) - Info: Loading plugin: expo compiz (core) - Info: Starting plugin: expo compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Error: Plugin init failed: expo compiz (core) - Error: Failed to start plugin: expo compiz (core) - Info: Unloading plugin: expo compiz (core) - Info: Loading plugin: ezoom compiz (core) - Info: Starting plugin: ezoom compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Error: Plugin init failed: ezoom compiz (core) - Error: Failed to start plugin: ezoom compiz (core) - Info: Unloading plugin: ezoom compiz (core) - Info: Loading plugin: workarounds compiz (core) - Info: Starting plugin: workarounds compiz (core) - Error: Plugin 'opengl' not loaded. Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 compiz (core) - Info: Loading plugin: scale compiz (core) - Info: Starting plugin: scale compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Error: Plugin init failed: scale compiz (core) - Error: Failed to start plugin: scale compiz (core) - Info: Unloading plugin: scale Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Segmentation fault (core dumped)

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  • Acer Aspire blank screen

    - by Gerep
    I'm using Ubuntu 11.04 Natty and when I installed it I had a problem with blank screen on startup and found a solution but I have the same problem when it is inactive and goes blank screen, it won't come back, so I have to restart. Any ideas? Thanks in advance for any help. This is what solved my first problem: When you start editing the /etc/rc.local and add before exit 0: setpci -s 00:02.0 F4.B=00 Edit /etc/default/grub, edit the line GRUB_CMDLINE_LINUX_DEFAULT: GRUB_CMDLINE_LINUX_DEFAULT = "quiet splash acpi_osi = Linux" Update grub with: sudo update-grub2

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  • Ubuntu CD Boots to Black Screen

    - by Thomas
    I have a new Asus N76 Notebook and just downloaded the lastest ubuntu 12.10 desktop CD (x64). When I boot from the CD, I get to the selection asking to try or install Ubuntu (the text screen not the one with the Ubuntu logo). When I select one of these options, I get only a black screen. I have tried nomodeset, acpi=off but it does not change anything. I also tried booting a CD and an USB stick (same result). I have no idea what to try next. I have installed Ubuntu on several computers yet, never had this problem. Any suggestions? Thanks in advance. Thomas

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  • Black Login Screen after installing updates 12.04

    - by general_guts
    I love my lixux 12.04..till yesterday it installed new updates and i clicked on restart.. As system went to grub all normal & loaded normal..then instead of pretty desktop (auto login turned on) i have black screen asking for login and password.. Why? How i get my desktop back to before? Please help new noob!!! This is due to updates i am sure, nothing in hardware has changed and no other display settings changed.. using AMD diver from there site linux one for my raedeon 6850 and have catalyst driver working fine.. i have tried typing in weird commands but they didnt do much like sudo start lightdm and sudo startx .. didnt do anything just froze.. i dont exactly no what these commands do but something to do with black screen..so i thought id try it.. Thanks

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  • 12.10 Booting Into Variations Of Blank Screen

    - by user93954
    I've been running the Ubuntu 12.10 beta since about a month before the final release with almost no problems. However since the day of release (I'm assuming an update has caused this) I have had problems booting into the actual GUI interface. Trying to get it to work is just a case of hard shutting down until it works, but for most of the time I need to battle with various different kinds of black screens. These include a plain black screen, a flashing line and a flashing line that doesn't fit the resolution. Nine times out of ten the cursor will be displayed over these. It also sometimes manages to boot into Ubuntu, albeit text mode or sometimes it loads GRUB which it isn't setup to do. If anyone could help out with this it'd be great. I really, really don't want to have to go through yet another clean installation. Cheers.

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  • Screen Scraping Twitter

    - by BRADINO
    I got an email today asking for help to scrape Twitter. In particular, to be able to login. So I am going to show everyone, NOT to encourage anyone to violate Twitters terms of use but as an educational blog post about how PHP and cURL can be used to post variables and store cookies. Again, I am using the cScrape class I wrote, which you can download. Step 1 First go to twitter.com and look at the source code of the login to get the form field names and the form post location. You will see that the form posts to https://twitter.com/session and the username and password fields are session[username_or_email] and session[password] respectively. Step 2 Now you are ready to login. So using the fetch function in the Scrape class you create an associative array to contain the form values you want to post. The other thing you will need to do is uncomment the lines for CURLOPT_COOKIEFILE and CURLOPT_COOKIEJAR. Cookies will be required to stay logged in and scrape around. The paths to the cookie files need to be writable by your app. Also you will need to uncomment the line about CURLOPT_FOLLOWLOCATION. $data = array('session[username_or_email]' => "bradino", 'session[password]' => "secret"); $scrape->fetch('https://twitter.com/sessions',$data); Step 1.5 Oops that didn't work. All I got back was 403 Forbidden: The server understood the request, but is refusing to fulfill it. Ahhh I see another variable called authenticity_token I bet Twitter was looking for that. So let's back up and first hit twitter.com to get the authenticity_token variable, and then make the login post request with that variable included in our array of parameters. $scrape->fetch('https://twitter.com'); $data = array('session[username_or_email]' => "bradino", 'session[password]' => "secret"); $data['authenticity_token'] = $scrape->fetchBetween('name="authenticity_token" type="hidden" value="','"',$scrape->result); $scrape->fetch('https://twitter.com/sessions',$data); echo $scrape->result; So that's basically it. Now you are logged in and can scrape around and request other pages as you normally would. Sorry it wasn't a longer post. I really do enjoy this kind of stuff so if anyone has a request, hit me up. Errors? 1) Make sure that you are properly parsing the token variable 2) Make sure that you uncommented the lines about CURLOPT_COOKIEFILE and CURLOPT_COOKIEJAR, those options need to be enabled and be sure the path set is writable by your application 3) Make sure that the path to the cookie file is writable and that it is getting data written to it 4) If you get a message about being redirected you need to uncomment the line about CURLOPT_FOLLOWLOCATION, that option needs to be enabled true

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  • Improving performance for web scraping code

    - by Pankaj Upadhyay
    I have a website in which the code scrapes other websites for getting the accurate data. While the code works good but there a decent lag in performance because the code firsts downloads the html stream from various sites(some times 9 websites), extracts the relative part and then renders the html page. What should I do to get an optimal performance. Should I change from shared hosting (godaddy) to my own server or it has nothing to do with my hosting and I need to make changes to my code?

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