I can trigger the bug with docky anytime I want. Just move quickly through Docky icons with the mouse cursor (https://bugs.launchpad.net/ubuntu/+source/docky/+bug/1451379). I a few seconds the screen will freeze. Most of the times I have to wait for about 30 seconds. I can switch to text (Alt + Ctrl + F1) in the meantime and see that gnome-shell occupies the computer 100%. Nouveau driver writes lots of lines into syslog at the same time. But sometimes everything freezes and only hard reset helps.
It starts like that: May 21 08:35:37 computer gnome-session[8979]: nouveau: kernel rejected pushbuf: Invalid argument May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: krec 0 pushes 1 bufs 19 relocs 0 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 00000000 00000005 00000004 00000004 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 00000001 000001b9 00000002 00000002 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 00000002 00000007 00000002 00000002 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 00000003 0000000a 00000002 00000002 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 00000004 0000000b 00000002 00000002 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 00000005 00000008 00000002 00000002 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 00000006 00000006 00000004 00000000 00000004 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 00000007 0000019e 00000002 00000000 00000002 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 00000008 00000013 00000002 00000000 00000002 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 00000009 0000000d 00000004 00000004 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 0000000a 00000104 00000004 00000004 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 0000000b 00000124 00000002 00000002 00000002 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 0000000c 00000026 00000004 00000004 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 0000000d 00000090 00000002 00000002 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 0000000e 000001b1 00000002 00000002 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 0000000f 000001ac 00000002 00000002 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 00000010 000001ad 00000002 00000002 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 00000011 00000030 00000002 00000002 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: buf 00000012 000001ba 00000002 00000002 00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: ch0: psh 00000000 000005e7d4 000006045c May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x0004721c May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x0fac6881 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00086ff4 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x12c00000 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x04b00000 May 21 08:35:37 computer kernel: [263094.549645] nouveau E[gnome-shell[9087]] multiple instances of buffer 442 on validation list May 21 08:35:37 computer kernel: [263094.549650] nouveau E[gnome-shell[9087]] validate_init May 21 08:35:37 computer kernel: [263094.549652] nouveau E[gnome-shell[9087]] validate: -22 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00146200 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x511f0000 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x000000e6 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00000040 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00087240 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x000012c0 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x000004b0 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00047224 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00000001 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00146fe0 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x42dd0000 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00000016 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00000040 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00000000 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00047538 May 21 08:35:37 computer gnome-session[8979]: nouveau: #0110x00000001 And then hundreds of these lines with "nouveau: #..." -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-nouveau in Ubuntu. https://bugs.launchpad.net/bugs/1291574 Title: nouveau DRM GPU lockup, PFIFO unhandled status 0x00800000 Status in xserver-xorg-video-nouveau package in Ubuntu: Confirmed Bug description: Usually seen on large screen transitions, often in browser windows. Display freezes, and processes disappear. klog starts with nouveau ![ PFIFO][0000:01:00.0] unhandled status 0x00800000 nouveau E[ DRM] GPU lockup - switching to software fbcon and thereafter fills with nouveau E[Xorg[1868]] failed to idle channel 0xcccc0001 [Xorg[1868]] nouveau E[Xorg[1868]] failed to idle channel 0xcccc0001 [Xorg[1868]] nouveau E[ PFIFO][0000:01:00.0] playlist 0 update timeout nouveau E[Xorg[1868]] failed to idle channel 0xcccc0000 [Xorg[1868]] nouveau E[Xorg[1868]] failed to idle channel 0xcccc0000 [Xorg[1868]] nouveau E[ PFIFO][0000:01:00.0] channel 2 [Xorg[1868]] kick timeout nouveau E[ PFIFO][0000:01:00.0] channel 2 [Xorg[1868]] kick timeout nouveau E[ PFIFO][0000:01:00.0] playlist 0 update timeout repeated about every 150 seconds. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2 ProcVersionSignature: Ubuntu 3.13.0-16.36-generic 3.13.5 Uname: Linux 3.13.0-16-generic i686 .tmp.unity.support.test.1: ApportVersion: 2.13.3-0ubuntu1 Architecture: i386 CompizPlugins: [core,bailer,detection,composite,opengl,decor,regex,snap,imgpng,move,animation,mousepoll,compiztoolbox,resize,grid,unitymtgrabhandles,workarounds,gnomecompat,vpswitch,place,expo,wall,fade,ezoom,session,scale,unityshell] CompositorRunning: None Date: Wed Mar 12 15:10:37 2014 DistUpgraded: 2010-09-09 17:07:06,366 DEBUG enabling apt cron job DistroCodename: trusty DistroVariant: ubuntu ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: NVIDIA Corporation GK107 [GeForce GTX 650] [10de:0fc6] (rev a1) (prog-if 00 [VGA controller]) Subsystem: eVga.com. Corp. Device [3842:2650] LightdmGreeterLog: (lightdm-gtk-greeter:5159): Gtk-CRITICAL **: gtk_container_foreach: assertion 'GTK_IS_CONTAINER (container)' failed (lightdm-gtk-greeter:5159): Gtk-CRITICAL **: gtk_container_foreach: assertion 'GTK_IS_CONTAINER (container)' failed (lightdm-gtk-greeter:5159): Gtk-CRITICAL **: gtk_container_foreach: assertion 'GTK_IS_CONTAINER (container)' failed MachineType: MSI MS-7673 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-16-generic root=UUID=44b47c66-6a6d-465d-a0b6-e03e703616cb ro nomdmonddf nomdmonisw nomdmonddf nomdmonisw SourcePackage: xserver-xorg-video-nouveau UpgradeStatus: Upgraded to trusty on 2010-09-09 (1279 days ago) dmi.bios.date: 03/31/2011 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: V1.10 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: P67A-C43 (MS-7673) dmi.board.vendor: MSI dmi.board.version: 1.0 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: MSI dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV1.10:bd03/31/2011:svnMSI:pnMS-7673:pvr1.0:rvnMSI:rnP67A-C43(MS-7673):rvr1.0:cvnMSI:ct3:cvr1.0: dmi.product.name: MS-7673 dmi.product.version: 1.0 dmi.sys.vendor: MSI version.compiz: compiz 1:0.9.11+14.04.20140305-0ubuntu1 version.libdrm2: libdrm2 2.4.52-1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0~rc3-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0~rc3-0ubuntu3 version.xserver-xorg-core: xserver-xorg-core 2:1.15.0-1ubuntu6 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 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2 xserver.bootTime: Wed Mar 12 15:10:05 2014 xserver.configfile: default xserver.devices: input Power Button KEYBOARD, id 6 input Power Button KEYBOARD, id 7 input daskeyboard KEYBOARD, id 8 input daskeyboard KEYBOARD, id 9 input Logitech USB-PS/2 Optical Mouse MOUSE, id 10 xserver.errors: Failed to load module "nvidia" (module does not exist, 0) Failed to load module "nvidia" (module does not exist, 0) xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.15.0-1ubuntu6 xserver.video_driver: nouveau To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1291574/+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
