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Since recently my trusty partition has problems booting into kernel
3.19.0-25. At startup the message

nouveau E[  PFIFO][0000:01:00.0] SCHED_ERROR [ UNK06 ]

is repeated more than 3000 followed by

nouveau E[   PFIFO][0000:01:00.0] runlist 4 update timeout
nouveau E[   PFIFO][0000:01:00.0]  FB_FLUSH_TIMEOUT

It then continues to regular log in, but every now and so on it freezes
and a reboot is necessary.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
ProcVersionSignature: Ubuntu 3.19.0-25.26~14.04.1-generic 3.19.8-ckt2
Uname: Linux 3.19.0-25-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.14.1-0ubuntu3.18
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: None
Date: Sun Nov  8 19:45:19 2015
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
DkmsStatus: virtualbox, 4.3.10: added
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: CLEVO/KAPOK Computer Device [1558:2300]
   Subsystem: CLEVO/KAPOK Computer Device [1558:2300]
InstallationDate: Installed on 2015-11-05 (3 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
MachineType: Notebook W230SS
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-25-generic root=UUID=51abc12c-f81a-4ec7-baf7-469ad09a3fb7 ro quiet splash
SourcePackage: xserver-xorg-video-nouveau
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/15/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 4.6.5
dmi.board.asset.tag: Tag 12345
dmi.board.name: W230SS
dmi.board.vendor: Notebook
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: Notebook
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd04/15/2014:svnNotebook:pnW230SS:pvrNotApplicable:rvnNotebook:rnW230SS:rvrNotApplicable:cvnNotebook:ct9:cvrN/A:
dmi.product.name: W230SS
dmi.product.version: Not Applicable
dmi.sys.vendor: Notebook
version.compiz: compiz 1:0.9.11.3+14.04.20150313-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.60-2~ubuntu14.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.5
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.5
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.7
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 2:2.99.910-0ubuntu1.6
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Sun Nov  8 17:38:28 2015
xserver.configfile: default
xserver.devices:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 
xserver.version: 2:1.15.1-0ubuntu2.7

** Affects: linux (Ubuntu)
     Importance: Medium
         Status: Incomplete


** Tags: amd64 apport-bug trusty ubuntu
-- 
nouveau E[  PFIFO][0000:01:00.0] SCHED_ERROR [ UNK06 ]
https://bugs.launchpad.net/bugs/1514232
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