I encountered a similar problem on my desktop system running 11.04 with the nVidia proprietary driver. Using Intel DH55TC motherboard and nVidia GTS 450 OR nVidia 9800GT (tried both). For me, the issue was resolved through a motherboard firmware update.
https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics- drivers/+bug/733374/comments/73 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/882710 Title: [NVIDIA] Monitor(s) black out and session freezes. "NVRM: GPU at 0000:01:00.0 has fallen off the bus." Status in “nvidia-graphics-drivers” package in Ubuntu: Triaged Bug description: I run Ubuntu 11.10 on a Dell desktop with a dual use video card that goes into two monitors. They normally work great and I have no complaints. When I first upgraded to 11.10, I would occasionally have both monitors randomly black out, and I'd have to restart the computer to get them back. Though that problem seemed to go away, and I wrote it off to package upgrades that fixed a bug. Then, after upgraded unity and a bunch of other packages today it started it again. Three times I've had it black out this morning. I don't know why. Though I often use hotkeys to slide between workspaces, and one of the blackouts happened during a slide. [Next Actions] * [tseliot] Raise issue with NVIDIA * [Unity Engineering] Evaluate if twinview could be triggering a bug in unity? * Attempt to reproduce the bug outside Unity to see if it can be proved to not be Unity-specific * Identify if there's a way to reproduce the bug deliberately --- .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 Kernel Module 280.13 Wed Jul 27 16:55:43 PDT 2011 GCC version: gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3) .tmp.unity.support.test.0: ApportVersion: 1.23-0ubuntu3 Architecture: i386 CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,regex,mousepoll,vpswitch,animation,grid,snap,place,resize,session,gnomecompat,move,imgpng,unitymtgrabhandles,wall,fade,workarounds,expo,ezoom,scale,unityshell] CompositorRunning: compiz DistUpgraded: Log time: 2011-10-13 15:00:25.754620 DistroCodename: oneiric DistroRelease: Ubuntu 11.10 DistroVariant: ubuntu DkmsStatus: nvidia-current, 280.13, 2.6.38-11-generic, i686: installed nvidia-current, 280.13, 3.0.0-12-generic, i686: installed nvidia-current-updates, 280.13, 3.0.0-12-generic, i686: installed GraphicsCard: nVidia Corporation GT218 [GeForce 210] [10de:0a65] (rev a2) (prog-if 00 [VGA controller]) Subsystem: eVga.com. Corp. Device [3842:1310] InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1) JockeyStatus: xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Disabled, Not in use) xorg:nvidia_current_updates - NVIDIA accelerated graphics driver (post-release updates) (Proprietary, Enabled, In use) MachineType: Dell Inc. OptiPlex 745 NonfreeKernelModules: nvidia Package: unity 4.24.0-0ubuntu2b1 PackageArchitecture: i386 ProcEnviron: PATH=(custom, user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=7130e4f2-1020-48a0-807c-882bee26d3c3 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4 Tags: oneiric running-unity oneiric running-unity oneiric running-unity ubuntu regression-update compiz-0.9 Uname: Linux 3.0.0-12-generic i686 UpgradeStatus: Upgraded to oneiric on 2011-10-14 (13 days ago) UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare XorgLogOld: dmi.bios.date: 08/12/2008 dmi.bios.vendor: Dell Inc. dmi.bios.version: 2.6.2 dmi.board.name: 0RF705 dmi.board.vendor: Dell Inc. dmi.chassis.type: 3 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr2.6.2:bd08/12/2008:svnDellInc.:pnOptiPlex745:pvr:rvnDellInc.:rn0RF705:rvr:cvnDellInc.:ct3:cvr: dmi.product.name: OptiPlex 745 dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu5 version.libdrm2: libdrm2 2.4.26-1ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3 version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/882710/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
