I started having this issue [both monitors black out, no mouse our keyboard input, still able to SSH in over the network] after upgrading from 11.04 to 12.04. Generally, when I SSH after the freeze/hang, Xorg is taking 100% CPU and I see "EQ overflowing" in the Xorg.0.log.
My setup looks like this. Ubuntu 12.04 Linux box 3.2.0-51-generic #77-Ubuntu SMP Wed Jul 24 20:18:19 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux NVIDIA Driver Version: 304.88 [Additional Drivers: version current-updates] Quadro FX 2800M (GPU 0) Two displays: ViewSonic VX2439 Series (DFP-1), LGD (DFP-0) I believe that my issue is related to the following in /var/log/syslog (dmesg): [99101.294734] NVRM: GPU at 0000:01:00.0 has fallen off the bus. [99101.294742] NVRM: GPU at 0000:01:00.0 has fallen off the bus. There seem to be lots of threads concerning this error message with NVIDIA hardware, but no universal solution. http://www.nvnews.net/vbulletin/showthread.php?p=2571522 https://devtalk.nvidia.com/default/topic/567297/linux/linux-3-10-driver-crash/1 https://devtalk.nvidia.com/default/topic/537302/linux/both-screens-black-xorg-at-100-cpu-overflow-errors-in-xorg-0-log-nvidia-driver-310-14-quadro-fx/ http://www.cyberciti.biz/faq/debian-ubuntu-rhel-fedora-linux-nvidia- nvrm-gpu-fallen-off-bus/ http://forums.gentoo.org/viewtopic-t-925156-postdays-0-postorder-asc- start-25.html I have tried enabling TwinView in xorg.conf ala palewire in #45, but that did not seem to make any difference. I'm pretty sure the external monitor, or more likely its GPU, is involved because I do not have the problem when traveling without it. I have no reliable way to reproduce the issue. However, it does seem to happen often when I am scrolling a window, such as in a browser or paging in a terminal. Several times the screens have gone blank while I still have a finger on the mouse scrollwheel. Of course, this will not reliably produce a problem. WBB -- 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: Opinion 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
