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• Menus and text boxes look graphically corrupted in 12.10

  - by Stanton.Sculpture

  If I let my computer run long enough the screen gets glitchy or graphically corrupted only in certain areas i.e. in text related boxes, menus, menu bars, scroll bars, the system monitor window, etc. It becomes difficult to read what I am typing. Its been happening quite often and I can only fix it by restarting the computer, but its only a matter of time before it happens again. Don't know what else to do, its been a thorn in my side for quite some time now and I need a fix soon because its only gets more frequent until I'm rebooting my computer five times a day. I attached a picture of what happens to this bug report: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1083474 I know I can repeat this bug but I don't know how to catch it and document it. Any help would be greatly appreciated. Thank you

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• Gnome3 pointer barrier not working with dual monitors

  - by Nathan

  I have a dual monitor setup using Gnome3. Misc Info : In the past I used Fedora, there was a pointer barrier between my two monitors in the upper left corner so that I can hit the hot corner when moving from the right monitor to the left monitor. Problem : However, with my new Ubuntu installation, the barrier no longer exists and my mouse pointer glides straight to the next screen. This makes that hot corner nearly useless. I've looked around, messed with the values in /usr/share/gnome-shell/js/ui/layout.js, but I can't figure out how to make the pointer barrier work. may someone suggest hot to get the full utilization of hot cornet.

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• Windows 8 Consumer Preview and SkyDrive

  - by John Paul Cook

  SkyDrive integrates very nicely with Windows 8. More on that later. First, let’s discuss using Windows 8 x64 on VirtualBox. Since I wanted to test with x64 and didn’t have a Hyper-V server available, I used VirtualBox. The latest version of VirtualBox does list Windows 8 as a guest operating system choice. The first time I attempted the installation, I chose the experimental Direct3D graphics support. That didn’t work well. After what seemed like FOREVER looking at a completely black screen, I decided...(read more)

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• will Unity have a keyboard shortcut for accessing the "Session Menu" that appears on the panel?

  - by Sam

  I noticed in screen shots of Unity the presence of the "Session Menu" indicator in the right corner of the top-panel. This menu drops down to offer Log Out, Hibernate, Restart, Shut Down, etc. I know the keyboard shortcuts are not complete yet. But are there plans to implement a shortcut for accessing this Session Menu (i.e., so users can log out, restart & shut down without having to use the mouse)? Further, will the shortcut allow navigation through the menu by just typing the first letter of the listed word (e.g., R for restart and S for shut down)?

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• Wavefront mesh: determine which face a point belongs to?

  - by Mina Samy

  I have a 3D mesh Wavefront .obj file. Is there any algorithm that takes an arbitrary point coordinates as input and determines which face of the mesh that point belongs to ?? The mesh is rendered on the screen, then the user clicks on it, I want to determine which part of the mesh the user has clicked on ? Here's the code using LibGDX: Vector3 intersection=new Vector3(); Ray ray=camera.getPickRay(x, y); //vertices is an array that hold the coordinates of the mesh boolean ok=Intersector.intersectRayTriangles(ray, vertices, intersection); Thanks

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• Computer logout after closing the lid

  - by ejp1087

  I would like my computer to logout every time I close the lid. And by that I mean log out completely. Basically I want the startup applications to run every time I open the lid to my computer. Right now, it just locks the screen and comes right back when I type in my password. It would be really great if I can have it such that the startup applications run every time I open the lid. However, would logging out lose any unsaved files? Alternatively, do you know if there is a way to run a command every time I open the lid? Thanks!

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• Tool Review: Telerik JustDecompile

  - by Sam Abraham

  In the next few lines, I will be providing a brief review of Telerik’s JustDecompile, a free .Net decompiler and assembly browser. In using Telerik’s 2012 Q3 JustDecompile release, one can see many great features.  First off, I loved the built-in options for loading .Net assemblies automatically using the Open->Load Framework menu option. Other options enable loading assemblies from GAC, XAP URL or locally from disk. The ability to create an “Assembly List” is quiet handy for grouping and saving a “List” of DLLs to load. All loaded assemblies are shown in the left panel of a split-panel screen. Clicking an assembly expands all namespaces within. Drilling further to class level displays the actual source code in the right panel in either IL, C# or Visual Basic. In conclusion, JustDecompile has grown and quickly matured into an indispensible handy tool for us developers. Telerik’s effort in maintaining and updating JustDecompile as well as the company’s commitment to keeping it free is much appreciated and valued.

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• Boot delay and mouse lag at login after Ubuntu 12.04 update

  - by Roshan George

  I am facing these weird problems after updating Ubuntu 12.04 with apt-get update && apt-get upgrade: It takes too much time to come to the Plymouth theme after selecting Ubuntu from the grub menu. Is it possible to correct this? On the login screen, before entering the password, whenever I move the mouse, it is kind of lagging/stuck. Only after entering the password and pressing Enter, it works normally. I think this may be because of the updated kernel. If so, is it possible to downgrade the kernel to the previous one ? If that is not the reason, what can be the problem?

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• How do I find which isometric tiles are inside the cameras current view?

  - by Steve

  I'm putting together an isometric engine and need to cull the tiles that aren't in the camera's current view. My tile coordinates go from left to right on the X and top to bottom on the Y with (0,0) being the top left corner. If I have access to say the top left, top right, bottom left and bottom right corner coordinates, is there a formula or something I could use to determine which tiles fall in range? This is a screenshot of the layout of the tiles for reference. If there isn't one, or there's a better way to determine which tiles are on screen and which to cull, I'm all ears and am grateful for any ideas. I've got a few other methods I may be able to try such as checking the position of the tile against a rectangle. I pretty much just need something quick. Thanks for giving this a read =)

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• Game testing on Android - emulator or real devices?

  - by n00bfuscator

  I am working at a localization agency and we have been approached by a client about testing their games on iOS as well as Android. Testing on iOS seems fairly easy as we can just buy a couple of devices and we should be covered. For Android it seems to be completely different. From what i found, the emulator can cover all API levels, screen sizes and such, but i hear it's buggy and nothing could replace testing on real devices. With the vast amount of Android devices out there and the rate at which new devices are released it seems impossible to keep up. How can i test games (localization and functional) on Android covering all compatible devices?

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• Why is better to use external JavaScript or libraries ; and is it prefered to use jquery meaning more security?

  - by shareef

  I read this article Unobtrusive JavaScript with jQuery and I noticed these points in the slide page 11 some companies strip JavaScript at the firewall some run the NoScript Firefox extension to protect themselves from common XSS and CSRF attacks many mobile devices ignore JavaScript entirely screen readers do execute JavaScript but accessibility issues mean you may not want them to I did not understand the fourth point. What does it mean? I need your comment and responses on these points. Is not using JavaScript and switching to libraries like jQuery worth it? UPDATE 1 : whats the meaning of Unobtrusive JavaScript with jQuery ? and yes it does not say we should use libraries but we should have them on external files for that reason i asked my question.

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• My laptop hangs a lot

  - by Salahuddin

  My laptop is 1G ram and 120G hard-disk 1.68HZ processor , I've both Ubuntu and Windows7 on my machine For the last few days, my laptop, running Ubuntu 11.10 has been hanging a lot. A lot of the time, the touchpad won't work for unknown reasons, and I have to connect a USB mouse to be able to move the pointer on the screen. When browsing the web, the browser hangs a lot, and I have to restart the laptop to refresh it. I know that there is a hotkey to force Ubuntu to refresh when it hangs, but it doesn't work here.These problems happens only on ubuntu not on windows 7... How do I make Ubuntu light and fast? Help me, please.

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• Windows 8 and Ubuntu 12.10 dual boot

  - by Marty

  I have been having a tough time getting a new computer (Lenovo h430) that came with windows 8 to dual boot with ubuntu linux. I can get ubuntu to install from a usb drive and can use the live system (ubuntu 12.10) but dual booting has not worked. I have cruised the internet and tried a number of solutions such as easybcd 2.2 and boot repair under linux. I have also gone into the setup screen to try and fix it but the lenovo acromyms in the setup are not illuminating for me. Does anyone know of a clear set of instructions for installing ubuntu on a machine delivered with windows 8 ?

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• Grub rescue after installing Ubuntu from USB

  - by Victor Suarez

  I have Windows 7 installed in my internal HDD and wanted to try out Ubuntu so I have an USB to put Ubuntu LiveUSB on and installed Ubuntu on a external HDD and everything worked out fine. Now the problem. If I remove the external HDD and try to boot Windows normally it shows the grub rescue screen. The only way to boot into Windows is by having the external HDD attached. Is there any way I can make it so I won't have to have the external HDD attached to be able to boot my Windows 7?

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• Render 3d object to 2d surface (embedded system)

  - by Martin Berger

  i am working on an embedded system of a sort, and in some free time i would like to test its drawing capabilities. System in question is ARM Cortex M3 microcontroller attached to EasyMX Stellaris board. And i have a small 320x240 TFT screen :) Now, i have some free time each day and i want to create rotating cube. Micro C PRO for ARM doesnt have 3d drawing capabilities, which means it must be done in software. From the book Introduction to 3D Game Programming with DirectX 10 i know matrix algebra for transformations but that is cool when you have DirectX to set camera right. I gues i could make 2d object to rotate, but how would i go with 3d one? Any ideas and examples are welcome. Although i would prefer advices. I'd like to understand this.

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• Wubi downloaded and installed 64bit 12.10 on my 32bit netbook

  - by Troy

  I downloaded the Wubi installer on my atom N450 netbook. When I started up Ubuntu I got an error that read failed to change the mode of /ect/passwd- to 0600. Then while it booted it froze and several strange characters filled the screen. Finally it loaded it ran pretty slow, and I could connect to my router, but not to the internet. Ping 8.8.8.8 showed no server found. So I checked the about computer and it said I was running the 64 bit installation. Now I know that my computer has a low power 32 bit chip and even the Ubuntu iso download suggested a 32 bit installation. So I went to double check and see if I just missed the option for a 32 bit Wubi install and I did not. There was no option. Is there any way to download a 32 bit version of 12.10 through the Wubi?

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• How to log out with a command in a gnome-less environment?

  - by octosquidopus

  I installed various window managers (Awesome, dwm, etc.) from which I am not able to log out back to the login screen (gnome-session) in order to switch to another window manager. I need to reboot to do that, which is a waste of time. Question How can you log out via the terminal? didn't work.. dbus-send --session --type=method_call --print-reply --dest=org.gnome.SessionManager /org/gnome/SessionManager org.gnome.SessionManager.Logout uint32:1 ..neither did this: gnome-session-save --force-logout ..nor that: gnome-session-quit --force-logout they all returned: Failed to call logout: The name org.gnome.SessionManager was not provided by any .service files Is there a quick way to log out back into Gnome's session manager from a non-Gnome desktop manager using a terminal emulator? I know that CTRL+ALT+BACKSPACE can be configured to restart X, but I'm looking for the easiest way to log out.

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• How can I reconfigure the nvidia proprietary drivers from the command line (ssh)?

  - by Mathieu Pagé

  I have a linux HTPC (running XBMC) in my living room. This morning I ssh'ed into the machine and did upgrade it to 10.10. When it finaly resarted it says something about running in low quality graphics and eventually returned to a command line login prompt. I ssh'ed in again and did a sudo reboot now. When it came back on this time the image is rapidly scrolling from the top to the bottom of the screen. I guess the installed driver doesn't quite work with the S-Video port on which the TV is connected. previously it was working right with the nvidia proprietary drivers. How can I install thoses without using the GUI tool that comes with Ubuntu?

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• OpenGL ES 2. How do I Create a Basic Fading Streak Effect?

  - by dugla

  For the iPad app I am writing using OpenGL ES 2 I have a single quad - shaded using GLSL - that is dragged around the screen. Very basic. This works fine. But is rather boring. I want to increase the coolness a bit in the following way: when the user drags the quad it leaves a streak behind that fades over time. Continuous dragging would be a bit like a streaking comet across the night sky. What is the simplest way to implement this? Thanks.

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• DX10 sprite and pixel shader

  - by Alex Farber

  I am using ID3DX10Sprite to draw 2D image on the screen. 3D scene contains only one textured sprite placed over the whole window area. Render method looks like this: m_pDevice-ClearRenderTargetView(...); m_pSprite-Begin(D3DX10_SPRITE_SORT_TEXTURE); m_pSprite-DrawSpritesImmediate(&m_SpriteDefinition, 1, 0, 0); m_pSprite-End(); Now I want to make some transformations with the sprite texture in a shader. Currently the program doesn't work with shader. How it is possible to add pixel shader to the program with this structure? Inside the shader, I need to set all colors equal to red, and multiply pixel values by some coefficient. Something like this: float4 TexturePixelShader(PixelInputType input) : SV_Target { float4 textureColor; textureColor = shaderTexture.Sample(SampleType, input.tex); textureColor.x = textureColor.x * coefficient; textureColor.y = textureColor.x; textureColor.z = textureColor.x; return textureColor; }

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• How to load a text file from a server into iPhone game with AS3 in Adobe AIR?

  - by Phil

  Im creating an iPhone game with Adobe AIR, and I want to be able to load a simple text msg into an dynamic text box on the games front screen from my server (and then be able to update that text file on the server, so it updates automatically in the game after the game is on the app store) How would I go about acheiving that? is it as simple as using a getURL? are there any specifical issues with trying to do this on the iPhone via AIR that I should be aware of? Thanks for any advice.

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• Install 12.10 using Logitech Keyboard and mouse with bluetooth dongle

  - by Ryan

  I'm trying to install 12.10 on my system, but my mouse and keyboard are not working during installation. I use the Logitech MX5500 Bluetooth mouse+keyboard combo with a Bluetooth dongle. My keyboard and mouse work in my UEFI bios, and during the Windows 7/8 installation. My keyboard also works in the Ubuntu screen that allows me to set options, install, use the live cd, etc, before boot. I'm wondering if anyone knows a way to get this dongle working during the installation process so that I can actually install 12.10. Thanks.

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• Why can't the Unity panel be hidden?

  - by newboldrob

  I am a light Linux user. I have Natty installed on my netbook and used to have it dual-booted on my Windows 7 PC. After a total refresh of my notebook off came Ubuntu and I'm back to basics over there. But HERE (I'm running Natty on a HP-Mini) I've decided to poke around a bit to get the best user experience on this little thing. I really like the Unity interface but really hate the static Unity Panel. I have no clue why it's even necessary to be on globally. After all, in the classic interface, both panels can autohide or get filed aside with buttons on either side of the bar. On a 10" screen, real estate is at a premium. What intrinsic purpose does the static unity panel hold for the OS? There has to be a great reason for this thing to HAVE to be here. It ONLY goes away in fullscreen apps and I can't use everything fullscreen Why can the unity panel not be hidden?

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• Unity won't load in Ubuntu 12.10

  - by Nigel

  I just upgraded Ubuntu last night to 12.10 from 12.04. When I rebooted like it asked, everything seemed fine, except one of my monitors had a white screen, and I could not use it. After some tweaking in the AMD Catalyst center, I got it to work, but now Unity wont load, and the bar up top wont load either. I am in suspicion that it a problem with Compiz, but might be completely wrong. Any tips on getting this to work? I am also kind of new at Linux, but I could open a terminal and get Opera open for web browsing, but it is really choppy and slow.

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• How to take screenshot while a menu is open [closed]

  - by Anwar

  Possible Duplicate: How to take a screenshot of a whole desktop with app menu selection? I recently wanted to take a screen shot of a nautilus menu to provide an image to the answer of a nautilus related question. (I was looking for it). But when I opened up the menu and press the prtsrc key, nothing happened. I have also tried Shift+PrtSrc Key and Alt+PrtScr key. Result was the same. My question is : Is is not possible not take a screenshot while you have a menu open?. Is it bug or not? Note: To test this, just right-click on the desktop, and press prtsrc key.

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