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• Packard Bell EasyNote MZ35 freezes when AC unplugged and wireless on

  - by Sense Hofstede

  I would like to ask for some help debugging an irritating problem I'm having with my Packard Bell EasyNote MZ35 and Ubuntu 10.10. Always when the laptop is connected to a wireless network and the AC power lead is unplugged—so it's running on battery power—the system freezes. The screen turns black and shows the error GLib-WARNING **: getpwuid_r(): failed due to unknown user id (0), although this error is completely unrelated to the actual problem. Previous searches on the internet indicate that this error is unrelated to the bug I'm experiencing. It is suggested that Ubuntu tries to hibernate or suspend and that you're seeing the black screen running 'behind' the X server. That would explain the fact that curiously you still see—but cannot move—the mouse cursor. I've already set all the values of the GConf keys in /apps/gnome-power-manager/actions/ to 'nothing', disabled all power management actions I could find, but it didn't solve the problem. It is important to note that the freeze doesn't happen immediately after you unplug the AC power lead. The icon in the notification area may have changed already, but the freeze only occurs when the Notify OSD bubble appears that tells you how many time is left with your battery. Does anyone here have a clue about this problem? A workaround or the cause? If anyone could help me with disabling possible suspend/hibernate behaviour that might be related to this issue, that would be appreciated too. This issue has been reported as bug #666852.

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• Power supply surges detected during previous power on

  - by Blastcore

  Message is this: "Power supply surges detected during previous power on" "ASUS Auto-Surge was triggered to protect system from unstable power supply" When i went to sleep yesterday and woke up, when i moved the mouse to go back from screen saver, it didn't do anything. So i left it, i came back from class and got this issue. (I didn't restart before going to class... So the screen was left like it was) Today there was a power cut in half of my house. (Computer is on the side that it didn't cut...) Voltages are fine, like always. How do i remove message? It's just maybe sensor glitch? Even disabling the Anti-Surge my PC "shuts down" (Only monitor, but maybe components do too.)

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• Redirect input from one terminal to another

  - by Niki Yoshiuchi

  I have sshed into a linux box and I'm using dvtm and bash (although I have also tried this with Gnu screen and bash). I have two terminals, current /dev/pts/29 and /dev/pts/130. I want to redirect the input from one to the other. From what I understand, in /dev/pts/130 I can type: cat </dev/pts/29 And then when I type in /dev/pts/29 the characters I type should show up in /dev/pts/130. However what ends up happening is that every other character I type gets redirected. For example, if I type "hello" I get this: /dev/pts/29 | /dev/pts/130 $ | $ cat </dev/pts/29 $ el | hlo This is really frustrating as I need to do this in order to redirect the io of a process running in gdb (I've tried both run /dev/pts/# and set inferior-tty /dev/pts/# and both resulted in the aforementioned behavior). Am I doing something wrong, or is this a bug in bash/screen/dvtm?

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• 2D XNA C#: Texture2D Wrapping Issue

  - by Kieran

  Working in C#/XNA for a Windows game: I'm using Texture2D to draw sprites. All of my sprites are 16 x 32. The sprites move around the screen as you would expect, by changing the top X/Y position of them when they're being drawn by the spritebatch. Most of the time when I run the game, the sprites appear like this: and when moved, they move as I expect, as one element. Infrequently they appear like this: and when moved it's like there are two sprites with a gap in between them - it's hard to describe. It only seems to happen sometimes - is there something I'm missing? I'd really like to know why this is happening. [Edit:] Adding Draw code as requested: This is the main draw routine - it first draws the sprite to a RenderTarget then blows it up by a scale of 4: protected override void Draw(GameTime gameTime) { // Draw to render target GraphicsDevice.SetRenderTarget(renderTarget); GraphicsDevice.Clear(Color.CornflowerBlue); Texture2D imSprite = null; spriteBatch.Begin(SpriteSortMode.FrontToBack, null, SamplerState.PointWrap, null, null); ManSprite.Draw(spriteBatch); base.Draw(gameTime); spriteBatch.End(); // Draw render target to screen GraphicsDevice.SetRenderTarget(null); imageFrame = (Texture2D)renderTarget; GraphicsDevice.Clear(ClearOptions.Target | ClearOptions.DepthBuffer, Color.DarkSlateBlue, 1.0f, 0); spriteBatch.Begin(SpriteSortMode.FrontToBack, null, SamplerState.PointClamp, null, null); spriteBatch.Draw(imageFrame, new Vector2(0, 0), null, Color.White, 0, new Vector2(0, 0), IM_SCALE, SpriteEffects.None, 0); spriteBatch.End(); } This is the draw routine for the Sprite class: public virtual void Draw(SpriteBatch spriteBatch) { spriteBatch.Draw(Texture, new Vector2(PositionX, PositionY), null, Color.White, 0.0f, Vector2.Zero, Scale, SpriteEffects.None, 0.3f); }

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• Problems with HP laptop

  - by Jan

  So the problem is...every time I reboot or shutdown laptop and when the laptop is booting again I get screen (before loading OS) that HP discovered overheating and system went into hibernate. But the point is that laptop is not overheating nor going into hibernate by itself. Also becouse of the hybrid graphic cards I cannot install additional drivers. Desktop resolution and all works perfectly but I cannot use unity 3D also openGL doesn't work as it should (with cairo docks) As i've read some posts, people say that switcheero doesn't work on 12.04 so I haven't tried it.

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• Ubuntu impossible to install: "unable to find a medium containing a live filesystem"

  - by Lorenzo

  Yes, I have read questions and answers with similar titles for this issue, which prevented me from installing Ubuntu for several MONTHS now, trying to figure it out. I have a MacBookPro with triple partition (one for Mac Snow Leopard, one for Windows 7, one for Linux) created with reFIT firmware (not BootCamp). I set up the system according to these instructions for reFIT: http://lifehacker.com/5531037/how-to-triple+boot-your-mac-with-windows-and-linux-no-boot-camp-required Now. There is a free partition ready to accept Linux into its arms, but Linux does not want to participate. Most answers to the issue "unable to find a medium containing a live filesystem" point to changing the BIOS booting system (which I don't know how to do, especially using this reFIT booting system), and to changing the socket of the USB (which does not concern me, since I am using a CD, actually I tried with a CD, then with a DVD, since a blank CD is only 700MB while the iso image file of Ubuntu is about 731MB). Anyway. This is what happens: I am in the Mac system (using the Mac partition) I insert the DVD with the burned image of Ubuntu (yes I have tried burning it again and agin on both CD and DVD blank discs). I restart the computer. When reFIT loads, I hold down the ALT key until the CD image appears. I select it, and hit Enter. A small Ubuntu icon appears at the bottom of the screen. Then a Ubuntu sign appears in the middle of the screen with small dots underneath, lighting up progressively over and over to indicate it's loading. Then everything turns black and the following message appears, at the end of a few lines of text: "unable to find medium with live file system". Please provide very practical suggestions on what to do to an unexperienced wannabe Ubuntu very patient user. Please start by saying how do I access the BIOS setup from reFIT bootup, and exactly what and why I need to try and change. (Will this mess up my reFIT bootup?) And anything else I need to do to finally be able to install Ubuntu. Thanks

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• Why does my display keep turning off every 10 minutes?

  - by George Edison

  I have installed Ubuntu 11.10 (Oneiric) in VirtualBox as well as virtualbox-guest-additions . The display resolution adapts to the size of the window as expected, but the display turns off after 10 minutes of inactivity. Thinking there was some sort of power management issue at play, I went to Power in the settings dialog: There doesn't really seem to be anything there that mentions "turn off display after xxx minutes" so I assume everything is configured correctly there. Next I went to Screen and found an option there "Turn off after:". Aha! I thought. Now I have found the option - but alas: even after setting it to "never" and restarting multiple times, the display still shuts off after 10 minutes. What am I missing? What option am I overlooking?

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• How to blend multiple normal maps?

  - by János Turánszki

  I want to achieve a distortion effect which distorts the full screen. For that I spawn a couple of images with normal maps. I render their normal map part on some camera facing quads onto a rendertarget which is cleared with the color (127,127,255,255). This color means that there is no distortion whatsoever. Then I want to render some images like this one onto it: If I draw one somewhere on the screen, then it looks correct because it blends in seamlessly with the background (which is the same color that appears on the edges of this image). If I draw another one on top of it then it will no longer be a seamless transition. For this I created a blendstate in directX 11 that keeps the maximum of two colors, so it is now a seamless transition, but this way, the colors lower than 127 (0.5f normalized) will not contribute. I am not making a simulation and the effect looks quite convincing and nice for a game, but in my spare time I am thinking how I could achieve a nicer or a more correct effect with a blend state, maybe averaging the colors somehow? I I did it with a shader, I would add the colors and then I would normalize them, but I need to combine arbitrary number of images onto a rendertarget. This is my blend state now which blends them seamlessly but not correctly: D3D11_BLEND_DESC bd; bd.RenderTarget[0].BlendEnable=true; bd.RenderTarget[0].SrcBlend = D3D11_BLEND_SRC_ALPHA; bd.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA; bd.RenderTarget[0].BlendOp = D3D11_BLEND_OP_MAX; bd.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_ONE; bd.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO; bd.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_MAX; bd.RenderTarget[0].RenderTargetWriteMask = 0x0f; Is there any way of improving upon this? (PS. I considered rendering each one with a separate shader incementally on top of each other but that would consume a lot of render targets which is unacceptable)

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• Disable public Tomcat6 stack trace

  - by The NinjaSysadmin

  Can anyone advise me how I can go about disabling Tomcat6 from displaying stacktrace output to the browser? Tomcat: 6.0.29 I have made the following changes to /opt/apache-tomcat-6.0.29/conf/web.xml <error-page> <exception-type>java.lang.Throwable</exception-type> <location>/error.jsp</location> </error-page> I'm told putting this in place will give a white screen if the file doesn't exist, however I'm getting stack traces to the screen.

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• Ubuntu won't use my nvidia driver

  - by Spencer

  I'm running Ubuntu 12.10 on a laptop that has both Intel Integrated Graphics and an Nvidia Geforce 540m. I installed the drivers properly, but I can't manage to actually use them. I'm stuck in 640x480 resolution and the drivers aren't detected anywhere. Each time I open the Nvidia settings menu it says: "You do not appear to be using the NVIDIA X driver. Please edit your X configuration file (Just run 'nvidia-xconfig' as root), and restart the X server." ^Doing so does not help. Anybody have any ideas?

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• What's wrong with my custom .desktop xsession?

  - by Noam Gagliardi

  I want to create a custom Xmonad session that loads an .xsession script in my home folder. This is the original file I copied. This one works: [Desktop Entry] Encoding=UTF-8 Name=XMonad Comment=Lightweight tiling window manager Exec=xmonad Icon=xmonad.png Type=XSession This is my modified file, xmonad-custom.desktop. When I logout, then login choosing this "xmonad-custom", the screen just flashes and sends me back to the ubuntu login screen (as if it briefly logs in and out of the session): [Desktop Entry] Encoding=UTF-8 Name=XMonad Custom Comment=Lightweight tiling window manager Exec=/home/{username}/.xsession Icon=xmonad.png Type=XSession X-Ubuntu-Gettext-Domain=gdm I also tried without the last line. This is my ~/.xsession file, in case there's an error with this script: #!/bin/env bash xrdb -merge .Xresources trayer --edge top --align right --SetDockType true --SetPartialStrut \ true --expand true --width 15 --height 12 --transparent true --tint 0x000000 & dropbox start & exec xmonad

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• Libre Office/Writer PDF export: white borders appear between lines even after setting borders to none

  - by Yttric

  My document prints ok (exactly as it appears on the screen in Libre Office), but when I export to PDF and view the PDF on screen there are white borders around each text or picture object. Here's a sample snapshot from PDF/Preview: http://imgur.com/TWip5 I've tried selecting a paragraph and changing the border property to None as described in Libre Office help (http://help.libreoffice.org/Common/Borders), setting the "Line arrangement Default" to "Set no borders". But borders set by the Format dialog don't correspond to the borders I see in PDF/Preview. In PDF/Preview the border appears on line boundaries. Borders set in Format appear around each picture, for example. What am I doing wrong?

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• Remove LCD Stand for Wall Mounting - FSM-270YG

  - by Benjamin Chambers

  Based on Jeff Atwood's post on Coding Horror, I ordered one of these monitors, and I've been absolutely loving it. However, I recently (i.e. today) took the next step in monitor-y goodness and fastened the sucker to an articulated wall mount. Unfortunately, I can't figure out how to remove the stand. The flat portion comes off with a single screw, but the leg it fastens to has no apparent method of removing it. Has anyone figured out a trick for removing these, so they don't just stick out below the screen? Should I remove the screws from the backside of the screen, and look for an internal connection to remove? Or just give up and live with it? (After all, it's a great display, it's floating in the air in front of me, and the stand leg is only a minor annoyance).

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• A Virtual Dilemma

  - by antony.reynolds

  Solving a Gotcha with VirtualBox Guest Additions I was just building a new virtual machine based off an existing image that didn’t have the Virtual Box Guest Additions enabled.  The guest additions allow tight integration between the guest OS and the host environment, providing seemless mouse transfer and the ability to take advantage of full video screen size.  The guest additions need to be linked with the kernel which requires the kernel-devel package to be installed.  After installing this package and then trying to add the guest additions it failed, suggesting that I might not have the kernel-devel package that I had installed.  After a little though I finally realized what had happened.  When I grabbed the kernel-devel package I hadn’t checked the version of my kernel.  The kernel-devel I downloaded didn’t match the revision of the kernel I was running!  Hence my problems.  I upgraded the kernel to the same revision as my kernel-devel package and rebooted.  I had installed dkms so I was pleased to see that my VBox Additions successfully built and the mouse and screen now worked as expected. So now you know my embarrassing story for the day :-)

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• 12.04 Dual Monitor Configuration changes to "Mirrored" automatically

  - by Josef

  After installing 12.04 on my Samsung X120 Notebook (with Intel GMA 4500 internal graphics card) i have a Problem with the configuration off my 2nd monitor. Its a 22" with 1680 * 1050 Pixel connected via HDMI. I use the display configuration and set internal display=off and external display=main display. That works fine. After rebooting i still have that configuration, but after a while (often when i press a button on the keyboard), the configuration automatically changes to "Mirror Screen" and the internal display switches on. Both displays then have a bad resolution. When i do the manual display configuration again, everything is fine for the duration of that session. What could be the problem, that this display configuration gets lost / resets?

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• Ubuntu does not work with Nvidia drivers, gives random squares after logging in

  - by jimbo

  I tried installing both with wubi and by booting from a usb drive. After I tried both it was the same. Ubuntu tried to login, but after a while, a weird pattern with squarely shapes appeared. At one point, after using recovery mode and then the low graphics one (i don't remember how it was called exactly) i managed to get in. It still didn't display at correct resolution, and the mouse was invisible at times. However, after rebooting once, because i tried downloading the nvidia drivers, i didn't manage to get in again, so i have the same problem... I have no idea what to try to become unstuck. The main problem is that after the login, ubuntu crashes, with a screen full of randomly coloured squares. Should I just give up?

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• disable subtitles in mkv in quicktime

  - by Halst

  I want to watch movies without subtitles. And I also like QuickTime for the feature that it could extend the frame to fit the screen (even though it hides some area from the sides). I have Perian installed and I want to watch mkv files, but they are all with subtitles. In QuickTime in View-Subtitles the only option is Off, but still I can see the subtitles. VLC plays same movies without subtitles, but it doesn't have this nice feature of extending the movie frame so that it fits the screen.

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• Presario r3000 hangs on boot to Ubuntu 12.04

  - by Chris

  I have a Compaq Presario r3000 laptop with Ubuntu 12.04 32 bit. 1.2GB RAM, with a nvidia Gforce 420 Go with 32MB RAM. It hangs on bootup about 3 out of 4 times at either the purple screen, or with a cursor in the upper left corner. Booting without a splash screen shows it hanging after attempting to initialize the floppy controller. Unity has never booted to 3D either, only 2D, with the additional drivers always failing to install. I searched all over this board and found similar issues, and tried everything there. Extensive vid driver install and uninstalls. Network issues that I've since resolved. I even found a very similar topic with a fix that didn't work. I'll probably try a clean install today (given how much I've probably messed up), and I would really appreciate any ideas. I'm fairly new to Ubuntu, so if you would like to see any error logs or configs, please walk me through exactly how to get and post them here. Thanks.

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• How do engines avoid "Phase Lock" (multiple objects in same location) in a Physics Engine?

  - by C0M37

  Let me explain Phase Lock first: When two objects of non zero mass occupy the same space but have zero energy (no velocity). Do they bump forever with zero velocity resolution vectors or do they just stay locked together until an outside force interacts? In my home brewed engine, I realized that if I loaded a character into a tree and moved them, they would signal a collision and hop back to their original spot. I suppose I could fix this by implementing impulses in the event of a collision instead of just jumping back to the last spot I was in (my implementation kind of sucks). But while I make my engine more robust, I'm just curious on how most other physics engines handle this case. Do objects that start in the same spot with no movement speed just shoot out from each other in a random direction? Or do they sit there until something happens? Which option is generally the best approach?

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• HLSL - Creating Shadows in 2D

  - by richard

  The way that I create shadows is by the following technique: http://www.catalinzima.com/2010/07/my-technique-for-the-shader-based-dynamic-2d-shadows/ But I have questions to HLSL. The way that I currently do it is, I have a black and white image, where Black means 'object', and white means 'nothing'. I then distort the image like in the tutorial. I do this with a pixel shader, but instead of rendering to the screen, I render to a texture, back to my application. I then take this, and create the shadows, and then send it back to the graphics card to undo the distortion, after the shadow has been added - this comes back and I have a stencil of shadow. I can put this ontop of the original image and send them back to the graphics card, which then puts them on the screen. To me this is alot of back and forth. Is there a way i can avoid this? The problem that I am having is that I need to basically go through all positions in the texture 3 times, and use the new new texture every time instead of the orginal one. I tried to read up on Passes, but i don't think that i am heading in the right direction there. Help?

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• Star Wars: An Infographic Flowchart

  - by Jason Fitzpatrick

  If you can’t get enough of Star Wars lore, this minimalist set of infographics details major characters, conflicts, and alliances in the Star Wars universe. Courtesy of designer Marc Morera, the series of Star Wars infographics give a quick summary, presents all the major players in the movies, and connects all the players and events via flowchart. Hit up the link below to see all of them in their high-resolution glory. Star Wars Infographic [via Cool Infographics] How To Create a Customized Windows 7 Installation Disc With Integrated Updates How to Get Pro Features in Windows Home Versions with Third Party Tools HTG Explains: Is ReadyBoost Worth Using?

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• Make and receive calls from and to PC to mobile and vice versa

  - by Hunt

  I want to route normal phone calls (i.e. calls made from landline or mobile) to VoIP and vice versa. Fr example, if I dial a number from a PC I will be able to call the other person, and the other person is able to see my number on their screen. Similarly, if a person calls me, I can pick up a call on my PC and can see their number on my screen. I don't have any idea how to implement this – how would I go about doing that?

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• Network use of Gaming PC

  - by Matthew Patrick Cashatt

  Background After YEARS of waiting, I built the custom gaming PC of my dreams: Intel i7 - 975 Extreme Edition 3.3ghz (overclocked to 4.0) ATI Radeon 5970 2gb Corsair 256 gb SSD Drive 2 TB Sata II 3.0 7200rpm data drive 12 GB Kingston Hyper-X (1600mhz) DDR3 Windows 7 Ultra 64 bit And so on. . . Problem I hooked this beast up to our home theater and settled in for a great gaming season only to realize a couple of drawbacks: It's hard to accurately wax bad guys using a keyboard in your lap whilst reclined on your couch (and using a wireless keyboard). It's hard to read the text on the screen (i.e. menus, etc). I find that a 1:1 ratio (screen diagonal inch to inch away from screen) is optimum, but using the home theater, it's more like 1:3 which has me squinting unless I sit on the coffee table. The wife always seems to want the TV the same time I do and, unfortunately "Real Housewives of Beverly Hills" and Battlefield BC don't mix. I am losing the battle in the home theater room, but the PC has to stay there (long story). So, this leaves me with the option of playing in my home office which is about 30 feet away from the home theater. I am a software developer so I have a pretty decent set up in my office--multiple 1080p monitors, HP Envy 17 which can run games like Crysis in 720p with out stammering too much. Also, I can game very comfortably at my desk in the office. Still, even though the set up in my office can run games well enough, I don't want to regress to that when I have worked YEARS for an awesome gaming PC that can run everything on ultra high settings. My Question What are my options for running my games on the beastly desktop in the Home Theater, but physically playing in my office about 30 feet away? A really long HDMI cable? LAN/RDC? Details that May Help We have an open crawlspace so running cable from HT room to office is no problem. I already have networked the house with a LAN Any help is GREATLY appreciated. Thanks, Matt

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• How to restore Windows7 after restore ubuntu bootloader?

  - by Mateusz Rogulski

  At first I will describe my situation in a few points: I have installed Windows7, and then Ubuntu 11.04 on my machine. Then everything works fine and at start of system I have screen from linux where I can choose the system. Then I reinstall Windows7 and install Windows 8 on other partition. Then I can choose between Win7 and win8 when I start system. Then I need my Ubuntu back so I want restore my bootloader from Ubuntu. I boot Ubuntu from USB and in terminal write this commands: sudo fdisk -l Then I get: /dev/sda1 1 13 104391 de Dell Utility /dev/sda2 14 2805 22425601 5 Rozszerzona /dev/sda3 * 2805 41968 314572800 7 HPFS/NTFS /dev/sda4 41968 60802 151282688 7 HPFS/NTFS /dev/sda5 14 2445 19530752 83 Linux /dev/sda6 2445 2805 2893824 82 Linux swap / Solaris Next commands: sudo mount /dev/sda5 /mnt sudo mount --bind /dev /mnt/dev sudo mount --bind /proc /mnt/proc sudo chroot /mnt grub-install /dev/sda I get Installation finished. No error reported.. And when I start my machine I have old Ubuntu start screen to choose system. Ubuntu works well. But There are no Windows 8 option. But my primary problem is when I choose Windows 7 I have: error: no such device ... error: no such disk so I have no idea what can I do. I really need both systems to work. Any help would be appreciated.

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• Homegroup doesn't show other computers, but "Network" does

  - by McPherrinM

  I have a desktop and a laptop (both running windows 7) in my Windows 7 homegroup. The desktop created the homegroup, and the laptop joined it. Both share a few folders. On the laptop, I have no problem accessing the Desktop's shared folders via the "Homegroup" sidebar button in Windows Explorer. However, on the Desktop, I get the message No other homegroup computers are currently available in the homegroup screen. However, if I go to the Network page, I can see the other computer and browse its shared media. These shares were made by right clicking and choosing "Share with Homegroup". I can access the media, so this isn't a big problem, but I'm just confused as to why the Homegroup screen denies the existence of the other computer. Has anybody else encountered and resolved this?

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