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[Bug 1449354] [NEW] BUG: soft lockup - CPU#1 stuck for 22s! [compiz:4301

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Public bug reported:

$ lsb_release -rd
Description:	Ubuntu 14.04.2 LTS
Release:	14.04

Hardware: Asus P4C800 Deluxe MB with Pentium 4.

EXPECTED: responsive desktop GUI

ACUTUAL: The desktop GUI became unresponsive, forcing me to shut down
the machine via hardware and restart.


Apr 27 11:11:04 vitaly-desktop kernel: [ 2951.848068] nouveau E[compiz[4301]] failed to idle channel 0xcccc0000 [compiz[4301]]
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] BUG: soft lockup - CPU#1 stuck for 22s! [compiz:4301]
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] Modules linked in: hid_generic rfcomm bnep bluetooth 6lowpan_iphc snd_wavefront snd_cs4236 snd_opl3_lib snd_hwdep snd_wss_lib snd_mpu401_uart snd_seq_midi snd_seq_midi_event snd_rawmidi serio_raw snd_intel8x0 snd_ac97_codec ac97_bus snd_seq usbhid snd_pcm snd_seq_device nouveau snd_timer mxm_wmi wmi lpc_ich hid video ttm snd drm_kms_helper drm ns558 gameport i2c_algo_bit soundcore mac_hid shpchp parport_pc i82875p_edac edac_core ppdev lp parport uas usb_storage firewire_ohci firewire_core skge crc_itu_t pata_acpi floppy
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] CPU: 1 PID: 4301 Comm: compiz Not tainted 3.16.0-34-generic #47~14.04.1-Ubuntu
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./P4C800, BIOS 1021.005 08/04/2005
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] task: ecad56a0 ti: ee94e000 task.ti: ee94e000
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] EIP: 0060:[<c1326092>] EFLAGS: 00200292 CPU: 1
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] EIP is at ioread32+0x32/0x40
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] EAX: 00000001 EBX: f910f860 ECX: 00000000 EDX: f85e8048
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] ESI: f0757bc0 EDI: ee904d80 EBP: ee94fdb0 ESP: ee94fdac
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] CR0: 80050033 CR2: b560368e CR3: 30b00000 CR4: 000007f0
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] Stack:
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  f9087b02 ee94fdbc f90bc2cb eea04c80 ee94fdd8 f90b48d2 f0757be4 f0951e00
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  00000000 000003e8 ec83ed40 ee94fe24 f90b4c15 00000040 00000000 ec83ed40
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  ec83ed40 ecad56a0 00000000 ecad56a0 00007be4 f0951e00 ee94fe40 ec83ed40
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] Call Trace:
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f9087b02>] ? _nouveau_fifo_channel_rd32+0x12/0x20 [nouveau]
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90bc2cb>] nv10_fence_read+0x1b/0x20 [nouveau]
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90b48d2>] nouveau_fence_update+0x52/0x80 [nouveau]
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90b4c15>] nouveau_fence_wait+0x1e5/0x4d0 [nouveau]
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90b5146>] ? nouveau_fence_new+0x56/0xa0 [nouveau]
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90b35ac>] nouveau_channel_idle+0x6c/0x90 [nouveau]
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c1178215>] ? kfree+0xe5/0x120
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f903a39c>] ? nouveau_mm_fini+0x3c/0x70 [nouveau]
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90b35f6>] nouveau_channel_del+0x26/0xd0 [nouveau]
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90bb230>] nouveau_abi16_chan_fini+0x100/0x180 [nouveau]
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90bb493>] nouveau_abi16_fini+0x33/0x70 [nouveau]
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90b2230>] nouveau_drm_preclose+0x30/0x70 [nouveau]
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f876013c>] drm_release+0x4c/0x530 [drm]
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c11a2613>] ? __dentry_kill+0x113/0x1a0
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c118ffab>] __fput+0xcb/0x1e0
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c11900fd>] ____fput+0xd/0x10
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c1077d11>] task_work_run+0x91/0xb0
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c105e647>] do_exit+0x267/0x8e0
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c108950f>] ? wake_up_state+0xf/0x20
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c106bdcb>] ? zap_other_threads+0x6b/0x80
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c105ed34>] do_group_exit+0x34/0xa0
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c105edb6>] SyS_exit_group+0x16/0x20
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c169461f>] sysenter_do_call+0x12/0x12
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c1690000>] ? nl_portid_hash_rehash+0x5a/0x13c
Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] Code: 3d 00 00 01 00 76 0a 0f b7 d0 ed c3 90 8d 74 26 00 55 ba de c7 8b c1 89 e5 e8 0b ff ff ff b8 ff ff ff ff 5d c3 8d 74 26 00 8b 00 <c3> 8d b6 00 00 00 00 8d bc 27 00 00 00 00 81 fa ff ff 03 00 89
Apr 27 11:11:04 vitaly-desktop kernel: [ 2963.554202] perf interrupt took too long (2542 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
Apr 27 11:11:04 vitaly-desktop kernel: [ 2966.316058] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
Apr 27 11:11:05 vitaly-desktop kernel: [ 2966.968038] nouveau E[compiz[4301]] failed to idle channel 0xcccc0000 [compiz[4301]]
Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233530] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 1 [Xorg[3869]] subc 0 mthd 0x0068 data 0x00000788
Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233626] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x0184 data 0xbeef0202
Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233684] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x0188 data 0xbeef0201
Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233742] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x030c data 0x005eb000
Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233800] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x0310 data 0x006fa000
Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233857] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x0314 data 0x000000c8
Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233917] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x0318 data 0x00000100
Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233972] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x031c data 0x000000c8
Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.234029] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x0320 data 0x00000032

. . .

Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.256195] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 7 mthd 0x0a20 data 0x44520000
Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.256252] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 7 mthd 0x0a24 data 0x44034000
Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.256309] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 7 mthd 0x0a28 data 0x3f000000
Apr 27 11:11:20 vitaly-desktop kernel: [ 2981.996048] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
Apr 27 11:11:35 vitaly-desktop kernel: [ 2996.996023] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
Apr 27 11:11:50 vitaly-desktop kernel: [ 3011.996016] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
Apr 27 11:12:05 vitaly-desktop kernel: [ 3026.996016] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
Apr 27 11:12:20 vitaly-desktop kernel: [ 3041.996015] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
Apr 27 11:12:35 vitaly-desktop kernel: [ 3056.996018] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
Apr 27 11:12:50 vitaly-desktop kernel: [ 3071.996015] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
Apr 27 11:13:05 vitaly-desktop kernel: [ 3086.996016] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
Apr 27 11:13:56 vitaly-desktop kernel: [    0.000000] Initializing cgroup subsys cpuset
Apr 27 11:13:56 vitaly-desktop kernel: [    0.000000] Initializing cgroup subsys cpu
Apr 27 11:13:56 vitaly-desktop kernel: [    0.000000] Initializing cgroup subsys cpuacct

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.16.0-34-generic 3.16.0-34.47~14.04.1
ProcVersionSignature: Ubuntu 3.16.0-34.47~14.04.1-generic 3.16.7-ckt8
Uname: Linux 3.16.0-34-generic i686
ApportVersion: 2.14.1-0ubuntu3.10
Architecture: i386
CurrentDesktop: Unity
Date: Mon Apr 27 21:26:56 2015
InstallationDate: Installed on 2015-04-27 (0 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release i386 (20150218.1)
SourcePackage: linux-lts-utopic
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux-lts-utopic (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 trusty

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1449354

Title:
  BUG: soft lockup - CPU#1 stuck for 22s! [compiz:4301

Status in linux-lts-utopic package in Ubuntu:
  New

Bug description:
  $ lsb_release -rd
  Description:	Ubuntu 14.04.2 LTS
  Release:	14.04

  Hardware: Asus P4C800 Deluxe MB with Pentium 4.

  EXPECTED: responsive desktop GUI

  ACUTUAL: The desktop GUI became unresponsive, forcing me to shut down
  the machine via hardware and restart.


  
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2951.848068] nouveau E[compiz[4301]] failed to idle channel 0xcccc0000 [compiz[4301]]
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] BUG: soft lockup - CPU#1 stuck for 22s! [compiz:4301]
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] Modules linked in: hid_generic rfcomm bnep bluetooth 6lowpan_iphc snd_wavefront snd_cs4236 snd_opl3_lib snd_hwdep snd_wss_lib snd_mpu401_uart snd_seq_midi snd_seq_midi_event snd_rawmidi serio_raw snd_intel8x0 snd_ac97_codec ac97_bus snd_seq usbhid snd_pcm snd_seq_device nouveau snd_timer mxm_wmi wmi lpc_ich hid video ttm snd drm_kms_helper drm ns558 gameport i2c_algo_bit soundcore mac_hid shpchp parport_pc i82875p_edac edac_core ppdev lp parport uas usb_storage firewire_ohci firewire_core skge crc_itu_t pata_acpi floppy
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] CPU: 1 PID: 4301 Comm: compiz Not tainted 3.16.0-34-generic #47~14.04.1-Ubuntu
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./P4C800, BIOS 1021.005 08/04/2005
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] task: ecad56a0 ti: ee94e000 task.ti: ee94e000
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] EIP: 0060:[<c1326092>] EFLAGS: 00200292 CPU: 1
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] EIP is at ioread32+0x32/0x40
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] EAX: 00000001 EBX: f910f860 ECX: 00000000 EDX: f85e8048
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] ESI: f0757bc0 EDI: ee904d80 EBP: ee94fdb0 ESP: ee94fdac
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] CR0: 80050033 CR2: b560368e CR3: 30b00000 CR4: 000007f0
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] Stack:
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  f9087b02 ee94fdbc f90bc2cb eea04c80 ee94fdd8 f90b48d2 f0757be4 f0951e00
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  00000000 000003e8 ec83ed40 ee94fe24 f90b4c15 00000040 00000000 ec83ed40
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  ec83ed40 ecad56a0 00000000 ecad56a0 00007be4 f0951e00 ee94fe40 ec83ed40
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] Call Trace:
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f9087b02>] ? _nouveau_fifo_channel_rd32+0x12/0x20 [nouveau]
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90bc2cb>] nv10_fence_read+0x1b/0x20 [nouveau]
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90b48d2>] nouveau_fence_update+0x52/0x80 [nouveau]
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90b4c15>] nouveau_fence_wait+0x1e5/0x4d0 [nouveau]
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90b5146>] ? nouveau_fence_new+0x56/0xa0 [nouveau]
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90b35ac>] nouveau_channel_idle+0x6c/0x90 [nouveau]
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c1178215>] ? kfree+0xe5/0x120
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f903a39c>] ? nouveau_mm_fini+0x3c/0x70 [nouveau]
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90b35f6>] nouveau_channel_del+0x26/0xd0 [nouveau]
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90bb230>] nouveau_abi16_chan_fini+0x100/0x180 [nouveau]
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90bb493>] nouveau_abi16_fini+0x33/0x70 [nouveau]
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f90b2230>] nouveau_drm_preclose+0x30/0x70 [nouveau]
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<f876013c>] drm_release+0x4c/0x530 [drm]
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c11a2613>] ? __dentry_kill+0x113/0x1a0
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c118ffab>] __fput+0xcb/0x1e0
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c11900fd>] ____fput+0xd/0x10
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c1077d11>] task_work_run+0x91/0xb0
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c105e647>] do_exit+0x267/0x8e0
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c108950f>] ? wake_up_state+0xf/0x20
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c106bdcb>] ? zap_other_threads+0x6b/0x80
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c105ed34>] do_group_exit+0x34/0xa0
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c105edb6>] SyS_exit_group+0x16/0x20
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c169461f>] sysenter_do_call+0x12/0x12
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053]  [<c1690000>] ? nl_portid_hash_rehash+0x5a/0x13c
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2960.160053] Code: 3d 00 00 01 00 76 0a 0f b7 d0 ed c3 90 8d 74 26 00 55 ba de c7 8b c1 89 e5 e8 0b ff ff ff b8 ff ff ff ff 5d c3 8d 74 26 00 8b 00 <c3> 8d b6 00 00 00 00 8d bc 27 00 00 00 00 81 fa ff ff 03 00 89
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2963.554202] perf interrupt took too long (2542 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
  Apr 27 11:11:04 vitaly-desktop kernel: [ 2966.316058] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
  Apr 27 11:11:05 vitaly-desktop kernel: [ 2966.968038] nouveau E[compiz[4301]] failed to idle channel 0xcccc0000 [compiz[4301]]
  Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233530] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 1 [Xorg[3869]] subc 0 mthd 0x0068 data 0x00000788
  Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233626] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x0184 data 0xbeef0202
  Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233684] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x0188 data 0xbeef0201
  Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233742] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x030c data 0x005eb000
  Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233800] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x0310 data 0x006fa000
  Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233857] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x0314 data 0x000000c8
  Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233917] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x0318 data 0x00000100
  Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.233972] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x031c data 0x000000c8
  Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.234029] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 2 mthd 0x0320 data 0x00000032

  . . .

  Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.256195] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 7 mthd 0x0a20 data 0x44520000
  Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.256252] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 7 mthd 0x0a24 data 0x44034000
  Apr 27 11:11:13 vitaly-desktop kernel: [ 2975.256309] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 3 [Xorg[4632]] subc 7 mthd 0x0a28 data 0x3f000000
  Apr 27 11:11:20 vitaly-desktop kernel: [ 2981.996048] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
  Apr 27 11:11:35 vitaly-desktop kernel: [ 2996.996023] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
  Apr 27 11:11:50 vitaly-desktop kernel: [ 3011.996016] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
  Apr 27 11:12:05 vitaly-desktop kernel: [ 3026.996016] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
  Apr 27 11:12:20 vitaly-desktop kernel: [ 3041.996015] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
  Apr 27 11:12:35 vitaly-desktop kernel: [ 3056.996018] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
  Apr 27 11:12:50 vitaly-desktop kernel: [ 3071.996015] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
  Apr 27 11:13:05 vitaly-desktop kernel: [ 3086.996016] nouveau E[Xorg[3869]] failed to idle channel 0xcccc0000 [Xorg[3869]]
  Apr 27 11:13:56 vitaly-desktop kernel: [    0.000000] Initializing cgroup subsys cpuset
  Apr 27 11:13:56 vitaly-desktop kernel: [    0.000000] Initializing cgroup subsys cpu
  Apr 27 11:13:56 vitaly-desktop kernel: [    0.000000] Initializing cgroup subsys cpuacct

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.16.0-34-generic 3.16.0-34.47~14.04.1
  ProcVersionSignature: Ubuntu 3.16.0-34.47~14.04.1-generic 3.16.7-ckt8
  Uname: Linux 3.16.0-34-generic i686
  ApportVersion: 2.14.1-0ubuntu3.10
  Architecture: i386
  CurrentDesktop: Unity
  Date: Mon Apr 27 21:26:56 2015
  InstallationDate: Installed on 2015-04-27 (0 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release i386 (20150218.1)
  SourcePackage: linux-lts-utopic
  UpgradeStatus: No upgrade log present (probably fresh install)

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