nouveau write fault, CTXSW_TIMEOUT, hangs the display

[Daniel Barrett]

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)

[Daniel Barrett (dbarrett-m)]

This crash is now happening daily, ever since the latest plasma upgrade.

[Daniel Barrett (dbarrett-m)]

I switched from nouveau to the proprietary nvidia driver (nvidia-375), and the crashes have stopped.

[Miroslav Zaťko (mirec-z)]

same problem here. System freezes completely(except, I can move mouse pointer. Just move, no click) and after restart buch of "nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT]" in syslog. ubuntu 16.04, 4.4.0-78-generic #99-Ubuntu SMP, Lenovo P50.
I cannot switch to nvidia-XXX driver as it is unusable in multiple monitors configuration.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[vans163 (vans-163)]

After running the system for a week:

Aug 6 10:46:15 vessel kernel: [313879.612598] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT]
Aug 6 10:46:15 vessel kernel: [313879.612608] nouveau 0000:01:00.0: fifo: gr engine fault on channel 5, recovering...
Aug 6 10:46:15 vessel kernel: [313879.612853] nouveau 0000:01:00.0: fifo: PBDMA0: 01000000 [] ch 5 [007f337000 systemd-logind[580]] subc 0 mthd 0ff4 data 02c90000
Aug 6 10:46:15 vessel kernel: [313879.612870] nouveau 0000:01:00.0: fifo: PBDMA0: 01000000 [] ch 5 [007f337000 systemd-logind[580]] subc 0 mthd 0ff8 data 03620000

Debian Stretch

Linux vessel 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2+deb9u2 (2017-06-26) x86_64 GNU/Linux

GNOME Shell 3.22.3

Wayland Session

[ 859.763] (II) LoadModule: "nouveau"
[ 859.763] (II) Loading /usr/lib/xorg/modules/drivers/nouveau_drv.so
[ 859.763] (II) Module nouveau: vendor="X.Org Foundation"
[ 859.764] (II) [drm] nouveau interface version: 1.3.1
[ 859.764] (II) [drm] nouveau interface version: 1.3.1
[ 860.188] (II) NOUVEAU(0): [DRI2] DRI driver: nouveau
[ 860.188] (II) NOUVEAU(0): [DRI2] VDPAU driver: nouveau
[ 860.206] (II) NOUVEAU(1): [DRI2] DRI driver: nouveau
[ 860.206] (II) NOUVEAU(1): [DRI2] VDPAU driver: nouveau
[ 860.263] (II) AIGLX: Loaded and initialized nouveau
[ 860.285] (II) AIGLX: Loaded and initialized nouveau

[Konstantin Janojlic (candysavage)]

Has anyone managed to solve this?