Luiz, testing 12.04.5 is equivalent to testing Trusty, as they share the same kernel and xorg stack. You would have to test 12.04.0 to test the original Precise kernel and xorg stack.
** Description changed: My system freezes always while i am playing cs source dust2 map. The system shutdown and a see a message in logs: nvidia has fallen off bus. I search for another relevant information without success. I am using kernel 3.10.54 with nvidia 331.89 proprietary driver. - Some people said nouveau doesnt has a crash like that, so maybe it is - the only solution... - - Any help is welcome. - - Thanks + WORKAROUND: Use Nouveau. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xorg 1:7.7+1ubuntu8 Uname: Linux 3.10.54 x86_64 NonfreeKernelModules: nvidia .proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0' .proc.driver.nvidia.registry: Binary: "" .proc.driver.nvidia.version: - NVRM version: NVIDIA UNIX x86_64 Kernel Module 331.89 Tue Jul 1 13:30:18 PDT 2014 - GCC version: gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) + NVRM version: NVIDIA UNIX x86_64 Kernel Module 331.89 Tue Jul 1 13:30:18 PDT 2014 + GCC version: gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) .tmp.unity.support.test.0: - + ApportVersion: 2.14.1-0ubuntu3.3 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Mon Sep 8 00:37:22 2014 DistUpgraded: Fresh install DistroCodename: trusty DistroVariant: ubuntu ExtraDebuggingInterest: Yes, if not too technical GpuHangFrequency: Continuously GpuHangReproducibility: Yes, I can easily reproduce it GpuHangStarted: Since before I upgraded GraphicsCard: - NVIDIA Corporation GF114M [GeForce GTX 580M] [10de:1211] (rev a1) (prog-if 00 [VGA controller]) - Subsystem: CLEVO/KAPOK Computer Device [1558:5102] + NVIDIA Corporation GF114M [GeForce GTX 580M] [10de:1211] (rev a1) (prog-if 00 [VGA controller]) + Subsystem: CLEVO/KAPOK Computer Device [1558:5102] InstallationDate: Installed on 2014-06-14 (85 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) MachineType: CLEVO P150HMx ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.10.54 root=UUID=727896fd-6717-4299-ad41-e259af78a16f ro quiet debug intel_pstate=disable pcie_aspm=default pcie_pme=nomsi acpi.debug_layer=0x2 acpi.debug_level=0xffffffff pci=nocrs SourcePackage: xorg Symptom: display Title: Xorg freeze UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/09/2011 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 4.6.4 dmi.board.asset.tag: Not Applicable dmi.board.name: P150HMx dmi.board.vendor: CLEVO dmi.board.version: Not Applicable dmi.chassis.asset.tag: Not Applicable dmi.chassis.type: 10 dmi.chassis.vendor: CLEVO dmi.chassis.version: Not Applicable dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.4:bd08/09/2011:svnCLEVO:pnP150HMx:pvrNotApplicable:rvnCLEVO:rnP150HMx:rvrNotApplicable:cvnCLEVO:ct10:cvrNotApplicable: dmi.product.name: P150HMx dmi.product.version: Not Applicable dmi.sys.vendor: CLEVO version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.52-1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1 version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A xserver.bootTime: Mon Sep 8 00:30:25 2014 xserver.configfile: /etc/X11/xorg.conf xserver.errors: - + xserver.logfile: /var/log/Xorg.0.log xserver.outputs: - + xserver.version: 2:1.15.1-0ubuntu2.1 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1366661 Title: Xorg freeze To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1366661/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp