Calmarius, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com /daily-live/current/ .
If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report: apport-collect -p xorg REPLACE-WITH-BUG-NUMBER Thank you for your understanding. Helpful bug reporting tips: https://wiki.ubuntu.com/ReportingBugs ** Tags added: bios-outdated-1.26 ** Changed in: xorg (Ubuntu) Importance: Undecided => Low ** Changed in: xorg (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1257632 Title: A forgotten SDL_GL_SwapBuffers can cause system freeze Status in “xorg” package in Ubuntu: Incomplete Bug description: I'm not sure what's the root of the problem. But when I write SDL programs and forget SwapBuffers I only get a black window, and the system locks up: mouse remains responsive but keyboard dies (pressing lock keys does not cause the led switch). The only way to resume work is a hard reset. Of course forgetting swapBuffers is obviously my mistake, but the consequences are quite annoying. Minimal source code the reproduce it: #include <stdio.h> #include <SDL/SDL.h> #include <GL/gl.h> #define SCREEN_WIDTH 800 #define SCREEN_HEIGHT 600 void drawStuff() { glClearColor(0, 0, 1, 0); glClear(GL_COLOR_BUFFER_BIT); /* Without this the system locks up. */ /* SDL_GL_SwapBuffers(); */ } int main() { SDL_Surface *screen; SDL_Event event; SDL_Init(SDL_INIT_EVERYTHING); atexit(SDL_Quit); SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 ); screen = SDL_SetVideoMode(SCREEN_WIDTH, SCREEN_HEIGHT, 32, SDL_OPENGL); for(;;) { drawStuff(); while (SDL_PollEvent(&event)) { switch (event.type) { case SDL_QUIT: goto exitLoop; } } } exitLoop: SDL_FreeSurface(screen); return 0; } ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: xorg 1:7.6+12ubuntu2 ProcVersionSignature: Ubuntu 3.2.0-57.87-generic 3.2.52 Uname: Linux 3.2.0-57-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.0.1-0ubuntu17.6 Architecture: amd64 CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell] CompositorRunning: None Date: Wed Dec 4 09:11:01 2013 DistUpgraded: 2013-05-12 13:21:09,910 DEBUG enabling apt cron job DistroCodename: precise DistroVariant: ubuntu DkmsStatus: vboxhost, 4.3.4, 3.2.0-56-generic, x86_64: installed vboxhost, 4.3.4, 3.2.0-57-generic, x86_64: installed ExtraDebuggingInterest: Yes, if not too technical GpuHangFrequency: This is the first time GpuHangReproducibility: Yes, I can easily reproduce it GpuHangStarted: Today GraphicsCard: Intel Corporation 4 Series Chipset Integrated Graphics Controller [8086:2e12] (rev 03) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Device [103c:3034] Subsystem: Hewlett-Packard Company Device [103c:3034] InstallationMedia: Ubuntu 10.04.4 LTS "Lucid Lynx" - Release amd64 (20120214.2) MachineType: Hewlett-Packard HP Compaq dc7900 Small Form Factor MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=hu_HU.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-57-generic root=UUID=be6a77fe-88c7-4689-a680-51684e19672d ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display Title: Xorg freeze UpgradeStatus: Upgraded to precise on 2013-05-12 (205 days ago) dmi.bios.date: 03/05/2009 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 786G1 v01.16 dmi.board.asset.tag: CZC9331R6C dmi.board.name: 3031h dmi.board.vendor: Hewlett-Packard dmi.chassis.asset.tag: CZC9331R6C dmi.chassis.type: 4 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr786G1v01.16:bd03/05/2009:svnHewlett-Packard:pnHPCompaqdc7900SmallFormFactor:pvr:rvnHewlett-Packard:rn3031h:rvr:cvnHewlett-Packard:ct4:cvr: dmi.product.name: HP Compaq dc7900 Small Form Factor dmi.sys.vendor: Hewlett-Packard version.compiz: compiz 1:0.9.7.12-0ubuntu3 version.ia32-libs: ia32-libs 20090808ubuntu36 version.libdrm2: libdrm2 2.4.43-0ubuntu0.0.3 version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.4-0ubuntu0.6 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.4-0ubuntu0.6 version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.14 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1.2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4.4 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1257632/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
