Public bug reported:
A few hours after upgrading to the latest kernel and plasma (using apt
upgrade) in Xenial 16.04LTS, my computer display hung with:
Feb 2 20:36:16 snorkack kernel: [83600.290217] nouveau 0000:01:00.0: fifo:
write fault at 000027c000 engine 00 [GR] client 0e [GPC0/GPCCS] reason 02 [PTE]
on channel 2 [007f9a3000 Xorg[1501]]
Feb 2 20:36:16 snorkack kernel: [83600.290221] nouveau 0000:01:00.0: fifo: gr
engine fault on channel 2, recovering...
Feb 2 20:33:42 snorkack colord[1394]: (colord:1394): Cd-WARNING **: failed to
get session [pid 27934]: No such device or address
Feb 2 20:36:19 snorkack vmnet-dhcpd: DHCPREQUEST for 192.168.50.128 from
00:0c:29:d5:2d:15 via vmnet8
Feb 2 20:36:19 snorkack vmnet-dhcpd: DHCPACK on 192.168.50.128 to
00:0c:29:d5:2d:15 via vmnet8
Feb 2 20:36:20 snorkack kernel: [83604.585547] nouveau 0000:01:00.0: fifo:
SCHED_ERROR 0a [CTXSW_TIMEOUT]
Feb 2 20:36:20 snorkack kernel: [83604.585553] nouveau 0000:01:00.0: fifo: sw
engine fault on channel 8, recovering...
Feb 2 20:36:22 snorkack kernel: [83606.583732] nouveau 0000:01:00.0: fifo:
runlist 0 update timeout
Feb 2 20:36:24 snorkack kernel: [83608.880576] nouveau 0000:01:00.0: fifo:
SCHED_ERROR 0a [CTXSW_TIMEOUT]
Feb 2 20:36:29 snorkack kernel: [83613.175601] nouveau 0000:01:00.0: fifo:
SCHED_ERROR 0a [CTXSW_TIMEOUT]
Feb 2 20:36:33 snorkack kernel: [83617.470624] nouveau 0000:01:00.0: fifo:
SCHED_ERROR 0a [CTXSW_TIMEOUT]
Feb 2 20:36:37 snorkack kernel: [83621.765648] nouveau 0000:01:00.0: fifo:
SCHED_ERROR 0a [CTXSW_TIMEOUT]
Feb 2 20:36:42 snorkack kernel: [83626.060672] nouveau 0000:01:00.0: fifo:
SCHED_ERROR 0a [CTXSW_TIMEOUT]
...repeats many times...
I could still log in via SSH but could not unhang the system, so I
rebooted.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xserver-xorg-video-nouveau 1:1.0.12-1build2
ProcVersionSignature: Ubuntu 4.4.0-62.83-generic 4.4.40
Uname: Linux 4.4.0-62-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CurrentDesktop: KDE
Date: Thu Feb 2 23:20:22 2017
InstallationDate: Installed on 2016-09-25 (131 days ago)
InstallationMedia: Kubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
SourcePackage: xserver-xorg-video-nouveau
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: xserver-xorg-video-nouveau (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
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https://bugs.launchpad.net/bugs/1661486
Title:
nouveau write fault, CTXSW_TIMEOUT, hangs the display
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