[Nouveau] [Bug 100567] Nouveau system freeze fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100567

--- Comment #12 from Marc Burkhardt <libreoffice.org at marc.ngoe.de> ---
On my Lenovo P50 this problem is newly introduced since I use a 4.14 kernel.
Kernels below that are stable/working in regard of that problem. This is what I
can aquire from the logs:

Dec 28 17:23:13 marc kernel: [ 5657.352825] nouveau 0000:01:00.0: fifo: channel
2: killed
Dec 28 17:23:13 marc kernel: [ 5657.352827] nouveau 0000:01:00.0: fifo: runlist
0: scheduled for recovery
Dec 28 17:23:13 marc kernel: [ 5657.352830] nouveau 0000:01:00.0: fifo: engine
0: scheduled for recovery
Dec 28 17:23:13 marc kernel: [ 5657.352833] nouveau 0000:01:00.0: X[5708]:
channel 2 killed!
Dec 28 17:23:13 local kernel: nouveau 0000:01:00.0: gr: TRAP ch 2 [00ffbd0000
X[5708]]
Dec 28 17:23:13 local kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 80000000
Dec 28 17:23:13 local kernel: nouveau 0000:01:00.0: gr: GPC0/TPC1/TEX: 80000041
Dec 28 17:23:13 local kernel: nouveau 0000:01:00.0: fifo: read fault at
000ac40000 engine 00 [GR] client 07 [GPC0/T1_2] reason 02 [PTE] on channel 2
[00ffbd0000 X[5708]]
Dec 28 17:23:13 local kernel: nouveau 0000:01:00.0: fifo: channel 2: killed
Dec 28 17:23:13 local kernel: nouveau 0000:01:00.0: fifo: runlist 0: scheduled
for recovery
Dec 28 17:23:13 local kernel: nouveau 0000:01:00.0: fifo: engine 0: scheduled
for recovery
Dec 28 17:23:13 local kernel: nouveau 0000:01:00.0: X[5708]: channel 2 killed!
Dec 28 17:24:03 marc kernel: [ 5706.891489] sysrq: SysRq : Keyboard mode set to
system default
Dec 28 17:24:03 local kernel: sysrq: SysRq : Keyboard mode set to system
default
Dec 28 17:24:04 marc exiting on signal 15

I found this in my Xorg.0.log but I don't know if it's somehow related to the
above:

[   155.535] (EE) libinput bug: timer event13 debounce short: offset negative
(-2229)

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