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• Ubuntu (and any other linux os) not booting from cd or usb

  - by Amith

  I will tell you the whole story,one night when i was using KDE on Ubuntu 10.10 Kwin crashed then i shut down the os next day when i booted it the display came completely garbled and i went to safe graphics mode ,it worked and in reinstalled the Nvidia drivers and then restarted .Then immediatly, It said No init found Busybox XX.XX then I thought ill do a fresh install I inserted the ubuntu cd provided to me by Canonical.When i pressed 'try ubuntu without installing' instead of the graphic boot screen i saw.Ubuntu 10.10 in regular text and a progress bar few seconds after that the screen was flooded with error messages first alot of white then red.I then went to my win7 installation and saw a website which told me to find a Ext3 reader and format the ubuntu partition and the swap.I did that and when i restarted. GRUB configuration not found grub> Then it took my win 7 ERD and restored 7's bootloder Xp and 7 were working i put in the livecd again,Same error,Now usin my seven,Please help geeks,Ive even tried Knoppix,Fedora,Debiane.t.c they wont boot and i want to retain my win 7 and winxp partitions,I really miss linux.

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• Issues with nVidia GeForce 210 while watching movies

  - by David ???

  Ever since 10.04 I have been trying to resolve an issue with my graphics card - nVidia GeForce 210. I'm having issues when I watch movies - they are jumping all the time, even with Compiz disabled and when that is the only thing I am doing. I have tried the solution to How to get NVidia GeForce GT 210 drivers working on Lucid Lynx? but it didn't work. How can I fix this? Here are the steps I took: apt-get --purge remove xserver-xorg-video-nouveau edit /etc/default/grub to add the line GRUB_CMDLINE_LINUX="nouveau.modeset=0" sudo update-grub Reboot Download official Linux drivers from nVidia site. sh filename-of-downloaded-driver-package

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• Bad texture on model with different GPU

  - by Pacha

  I have some kind of distortion on the texture of my 3D model. It works perfectly well on an AMD GPU, but when testing on a integrated Intel HD graphics card it has a weird issue. I don't have a problem with the rest of my entities as they are not scaled. The models with the problems are scaled, as my engine supports different sizes for the platforms. I am using Ogre3D as rendering engine, and GLSL as shader language. Vertex shader: #version 120 varying vec2 UV; void main() { UV = gl_MultiTexCoord0; gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; } Fragment shader: #version 120 varying vec2 UV; uniform sampler2D diffuseMap; void main(void) { gl_FragColor = texture(diffuseMap, UV); } Screenshot (the error is on the right and left side, the top and bottom part are rendered perfectly well):

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• HDMI Audio stops after TV turned off

  - by Ryan

  After the 12.04 Update my HDMI audio stops working anytime I turn off my 2nd monitor(plasma TV). Graphics card is a Radeon 6800 which has DVI out to 1st monitor, HDMI out to receiver which the TV gets it's Audio/Video. Audio is always via my receiver sound. Things work fine as long as it boots with the TV and Receiver on. Turn off the TV and BART's HDMI audio will go away, and the HDMI option vanishes from the sound menu. I had an occasional HDMI issue with 11.10 but turning on/off the TV would fix the sound. How can I hardcode things so that it always uses HDMI out of audio? I suspect the TV is sending a signal upon that 12.04 is now listening for. Turning the TV back on does NOT resolve this, and I'd suggest having the ability to override this new "feature" via sound menu.

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• Not Quite Multiseat

  - by user2773520

  I am attempting to create a pair programming environment sort of set up like multiseat: https://help.ubuntu.com/community/MultiseatX[1] or https://help.ubuntu.com/community/MultiseatOneCard[2] (as the standard issue boxes only have one graphics card) The thing is, I only want one login session, just with 2 monitors, keyboards, and mice. As well as having 2 active applications (so 2 people can be typing independantly). They should ideally be able to mouse over and click & type in the other persons monitor, as well as move windows between the montors. Does anybody know of anything like this that will work? We are running Ubuntu 12.04.

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• Field of Poppies Wallpaper

  - by Asian Angel

  Poppies Field [DesktopNexus] Latest Features How-To Geek ETC Have You Ever Wondered How Your Operating System Got Its Name? Should You Delete Windows 7 Service Pack Backup Files to Save Space? What Can Super Mario Teach Us About Graphics Technology? Windows 7 Service Pack 1 is Released: But Should You Install It? How To Make Hundreds of Complex Photo Edits in Seconds With Photoshop Actions How to Enable User-Specific Wireless Networks in Windows 7 Access the Options for Your Favorite Extensions Easier in Firefox Don’t Sleep Keeps Your Windows Machine Awake DropSpace Syncs Android Files to Dropbox Field of Poppies Wallpaper The History Of Operating Systems [Infographic] DriveSafe.ly Reads Your Text Messages Aloud

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• 11.04 64 bit live install cd freezes immediately on boot

  - by wrchis

  I am trying to install 11.04 alpha to a free set of partitions to try it out but neither the regular graphic installer or the alternate installer work. The graphic one freezes when I try to boot the cd (or cd image on usb stick rather) with a distorted static picture of my regular desktop repeated four times. I have an nvidia 240 graphics card if that is any help in diagnosis. I think it is a matter of getting the cd image to use a low rez video mode but I have no idea how to force that. I have used both the iso's from the regular page and the daily page (for several days so far) and they all do the same thing. I have tried both the internal utility and unetbootin to set up the stick with the same results. The alternate installer seems to work up to the point of the software selection step and then throws a 'failed step' error part way through.

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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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• How do you maintain content size vs. content quality in an application?

  - by PeterK

  I am developing my first Cocos2d iPhone/iPad game that includes quite a few sprites, I would need approximately 80 different. As this is for both normal and HD displays I have 2x of each sprite. I am using TexturePacker to optimize the thing. I would like to ask if there are any rules-of-thumb, tricks, ideas etc. to adjust to in regards to size of content, quality and how you maintain high-quality HD-based graphics due to its size vs. the device memory sizes? Also, is it a good idea to only have one copy of the sprites and scale it using code?

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• soft question - Which of these topics is likely to be relevant in the future?

  - by Fool

  I hear some topics in computer science, such as object-oriented programming, are relevant today but may become obsolete in the future. I'm picking courses for a minor in computer science, and I need one more elective. Could someone help me choose topic(s) from the following list that would grant timeless knowledge, relevant and applicable in the future? Why are such topics relevant? Artificial Intelligence Human-Computer Interaction Object-Oriented Programming Operating Systems Compilers Networking Databases Graphics Automata and Complexity Theory Logic and Automated Reasoning Algorithms If some of these titles are too vague, I'll provide more info.

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• Best gui toolkit to use for creating 3D board game

  - by UserInteractive

  I have created a board game using Java and Swing - using GridLayout and various other apis. It works properly but the UI looks very very simple. I would want couple of animations like tilting the GridLayoutat any angle. There are pawns on boxes of the GridLayout that I want to be animated when somebody clicks on it. I'm not sure of the right GUI toolkit to use for this. Swing repaint is possible to a limit and cannot be used for a lot of animation and graphics. And I realized after creating the game that Swing is probably not a good tool to create games. Could anybody suggest a better framework to use that I can use it in Eclipse with Java? I was thinking of JavaFX or tools like Adobe Flash or Adobe Air. Any suggestions please?

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• What is the ideal laptop for creative coding applications?

  - by Jason

  Hi, I am a creative coder using C++(cinder and OpenFrameworks) I am looking to upgrade from my MacBook, which slowed down to about 3fps this morning. My project involves particles systems and fluids reacting to audio analysis data and computer vision data in real-time. SD or HD? no biggie. I have asked many people what computer I need. Ideally, I want a MacBook Pro. But is that enough power? I've been told that I need a desktop for what I am doing though I'd rather stay portable I've been told that I should go PC linux to get the most power but I'd rather stay mac I've been told that RAM is more of bottleneck than processor speed I've been told that the Graphics Card is more important than CPU and that code optimizations such as using trees over lists, proper threading, sending tasks to the GPU make a bigger difference than the hardware!!! what's true?! what do I need? Any suggestions are greatly appreciated

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• Confuse with OpenGL, SFML, and its library

  - by Robinson Joaquin

  I am a beginning to enter the world of game development. Lately, I researched that "OPENGL" is one of the tools to use in graphics, then I found out about "SFML" (I think that its a library or something that uses opengl). I am so confuse because all books/ sites said using "GLUT", but many people/fellow developers said that I must use a more updated one like "SFML" but sfml has few/none tutorials. What I am trying to say is "how to create own library or something like your own glut or sfml", and why does opengl has no source code? And how can I use the EXACT(not glut/sfml) opengl in my c++ program? I am so confuse....

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• How do you maintain content size vs. content quality in a mobile application?

  - by PeterK

  I am developing my first Cocos2d iPhone/iPad game that includes quite a few sprites, I would need approximately 80 different. As this is for both normal and HD displays I have 2x of each sprite. I am using TexturePacker to optimize the thing. I would like to ask if there are any rules-of-thumb, tricks, ideas etc. to adjust to in regards to size of content, quality and how you maintain high-quality HD-based graphics due to its size vs. the device memory sizes? Also, is it a good idea to only have one copy of the sprites and scale it using code?

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• Why did this command make my Ubuntu more awesome than before?

  - by the_misfit

  After running Ubuntu for months and liking it, I for the first time wanted to use headphones and was trying to get them to work so I ran the code in step 1 https://help.ubuntu.com/community/SoundTroubleshootingProcedure -- the result was an improvement in performance, resolution, and audio.. a vast improvement. What does that suggest about what was wrong with my settings before if running this improved system performance, graphics, and my audio problem? The command is: sudo add-apt-repository ppa:ubuntu-audio-dev/ppa; sudo apt-get update;sudo apt-get dist-upgrade; sudo apt-get install linux-sound-base alsa-base alsa-utils gdm ubuntu-desktop linux-image-`uname -r` libasound2; sudo apt-get -y --reinstall install linux-sound-base alsa-base alsa-utils gdm ubuntu-desktop linux-image-`uname -r` libasound2; killall pulseaudio; rm -r ~/.pulse*; sudo usermod -aG `cat /etc/group | grep -e '^pulse:' -e '^audio:' -e '^pulse-access:' -e '^pulse-rt:' -e '^video:' | awk -F: '{print $1}' | tr '\n' ',' | sed 's:,$::g'` `whoami`

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• Has an open console any chance to give more strength to the indie game world ?

  - by jokoon

  I have heard about the GPX, but i don't really think the embedded market is mature enough in terms of performance, but what about the home console market ? I'm not talking about last-generation graphics, because that would be economically impossible, but what about an hardware as fast as a playstation 2/Xbox 1/Gamecube ? For games, the trick would be to ask some editors to recompile their best sellers for the new machine: those games being from the PSX age or even older console generations, I think this would have a very low cost job and they could still make some good profit, but I need to know if this is doable technically, considering the architecture which can be quite exotic. Do you think it would be a viable project to talk about to investors ?

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• What to do when Ubuntu 13.10 64-bit does not boot?

  - by Anonymous John

  Ubuntu 13.10 will not boot, it won't even show the grub menu or Ubuntu booting. There is just a purple screen for 20 seconds then a black screen, then the screen says entering power save mode. here are my system specs:Intel DQ965GF Motherboard (OS independant), Intel core 2 64-bit, 12GB HHD (SATA), 200GB HHD (SATA, installed here), 250GB HHD (SATA, Encrypted with LUKS), 3GB DDR2 RAM (DIMM 0 A 1024MB,DIMM 1 A 524MB, DIMM 0 B 1024MB, DIMM 1 B 524MB),2 Rewritable DVD drives (one SATA and one IDE), small floppy drive and car reader, and AMD gallium 0.4. That's all I know from the top of my head, I have no OS to give me more info on the graphics card, but all Ubuntu OSs worked on my PC from 12.04-13.04 just fine. Does this mean will never be able to use Ubuntu 13.10? I think I am screwed.

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• How can I install ATI Catalyst Video driver of Ubuntu 12.04.3?

  - by Eastsun

  EDIT My computer is Thinkpad E420 with Intel HD3000 and ATI 6630m. I have reinstalled my Ubuntu12.04.3 yesterday. I had successfully installed Ubuntu and ATI Catalyst Video driver many times about half year ago following these links: How do I get AMD/Intel Hybrid Graphics drivers to work? What is the correct way to install ATI Catalyst Video Drivers (fglrx)? However, this time I have no luck with installing ATI Catalyst Video driver. I have tried version 13.4, 13.1, 12.8 of ATI Catalyst Video driver. It seemed that 13.4 doesn't support 12.04 any more, following this link , the lowest Ubuntu version supported by ATI 13.4 is 12.10 and for the reset of the ATI drivers, the kernel version and xorg version of Ubuntu 12.04.3 is too high to be supported. So, should I stay on ubuntu 12.04.1 with ATI 12.8, or there is any way to install ATI driver on Ubuntu 12.04.3?

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• notification from additional driver

  - by MAHESH

  today i installed ubuntu 11.10 in my HP laptop well everything goes well installation and updates. i get notification on task bar from additional driver No propritery drivers are in use on this system i will elaborate what i seen on the screen proprietry driver do not have public source code that ubuntu developer are free to modify security updates and correction depend solely on the respnsiveness of the manufacture ubuntu cannot fix or improve these drivers. ATI/AMD proprietry FGLRX graphic driver( post release update) 2.ATI/AMD proprietry FGLRX graphic driver ATI/AMD propreitry FGLRX graphics driver(post release update) tested by ubuntu developers License propreitry 3D accelerated propreitry graphic drivers for ATI cards. This driver is required to fully utilise the 3D potential of some ATI graphic and as well as provide 2D accelerate newer card. guys do i need to active this driver in order to accomplish the complete installation. your response will be greatful

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• Ubuntu 12.10 Help! Everything is incredibly slow

  - by Keith

  I installed 12.10 from usb onto this machine. Intel celeron 2.00 GHz 496MB RAM I had to modify GNU-Grub to read "nomodeset" or i could not see the GUI. I have an Nvidia graphics card. Takes about 2 minutes to boot. The icons on the left of desktop take about 1 min to slowly open their menu. Have a network connection but mozilla is 404 and i cannot update. Where can i find a blow by blow explanation for troubleshooting and repairing this problem?

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• How Can I Upgrade to 11.10 from the Command Line?

  - by nmagerko

  I am trying to upgrade my 11.04 Ubuntu operating system to 11.10, as the current system is not the most recent. However, I cannot use the GUI to upgrade - as from past experience I have learned this - because my graphics hardware only works on 10.04 to 11.04 (non-inclusive) and from 11.10+. So once I can get to 11.10, I should be just fine. Because of this, I need to find a way to upgrade the OS from the command line. Can this be done? Thanks for any and all help.

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• Algorithm to simplify building/structural meshes

  - by morpheus

  I am looking for an algorithm to simplify the meshes of buildings or similar structures. EDIT: I had made a comment that Hoppe's algorithm tends to make meshes more and more spherical with simplification. But, I am not sure about it, so am deleting the comment. Buildings in contrast should tend to become more and more rectangular with increasing simplification. The D3DX extensions for D3D in version 9.0 (d3dx9.lib) used to have classes to do progressive mesh simplification. See: http://doc.51windows.net/Directx9_SDK/?url=/directx9_sdk/graphics/reference/d3dx/functions/mesh/d3dxgeneratepmesh.htm http://msdn.microsoft.com/en-us/library/windows/desktop/bb281243(v=vs.85).aspx

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• How to get the Dash and HUD to appear. (and stop Unity spewing error messages.)

  - by Ubuntiac

  I just installed Ubuntu 12.04 on my wifes Dell Inspiron 1501, which uses an R300 ATI graphics chip. Neither the Dash or HUD appear when pushing the appropriate key. When I try unity --reset & in the terminal, I see that over and over it's spitting out: r300: CS space validation failed. (not enough memory?) Skipping rendering. This is just after starting Ubuntu with no apps open, so I find it hard to believe that just rendering the Dash / HUD is completely blowing out the VRAM. Any suggestions on getting this working? /usr/lib/nux/unity_support_test -p shows OpenGL vendor string: X.Org R300 Project OpenGL renderer string: Gallium 0.4 on ATI RS480 OpenGL version string: 2.1 Mesa 8.0.2 Not software rendered: yes Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes GL vertex program: yes GL fragment program: yes GL vertex buffer object: yes GL framebuffer object: yes GL version is 1.4+: yes Unity 3D supported: yes All sections say "YES"

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• Issues with nVidia GeForce 210 while watching movies

  - by David ???

  Ever since 10.04 I have been trying to resolve an issue with my graphics card - nVidia GeForce 210. I'm having issues when I watch movies on 10.10 - they are jumping all the time, even with Compiz disabled and when that is the only thing I am doing. I have tried the solution to How to get NVidia GeForce GT 210 drivers working on Lucid Lynx? but it didn't work. How can I fix this? Here are the steps I took: apt-get --purge remove xserver-xorg-video-nouveau edit /etc/default/grub to add the line GRUB_CMDLINE_LINUX="nouveau.modeset=0" sudo update-grub Reboot Download official Linux drivers from nVidia site. sh filename-of-downloaded-driver-package

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• Profiling and containing memory per system

  - by chadb

  I have been interesting in profiling and keeping a managed memory pool for each subsystem, so I could get statistic on how much memory was being used in something such as sounds or graphics. However, what is the best design for doing this? I was thinking of using multiple allocators and just using one per subsystem, however, that would result in global variables for my allocators (or so it would seem to me). Another approach I have seen/been suggested is to just overload new and pass in an allocator for a parameter. I had a similar question over on stackoverflow here with a bounty, however, it seems as if perhaps I was too vague or just there is not enough people with knowledge in the subject.

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