[Nouveau] [Bug 95054] KDE 5 / Plasma crashes with nouveau "fifo: gr engine fault on channel 2, recovering" or "gr: TRAP ch 2"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95054

--- Comment #4 from René Krell <renda.krell at gmail.com> ---
I'm affected by the same problem on a different hardware.

/var/log/messages:
---
2016-06-01T10:31:51.921964+02:00 rkrell kernel: [  249.913240] nouveau
0000:01:00.0: gr: TRAP ch 2 [003fbfa000 X[2532]]
2016-06-01T10:31:51.921965+02:00 rkrell kernel: [  249.913245] nouveau
0000:01:00.0: gr: GPC0/TPC0/TEX: 80000009
...
# the above repeated many times
...
2016-06-01T10:31:59.599064+02:00 rkrell kernel: [  257.590487] nouveau
0000:01:00.0: fifo: read fault at 0000240000 engine 00 [GR] client 01
[GPC0/T1_0] reason 02 [PTE] on channel 2 [003fbfa000 X[2532]]
2016-06-01T10:31:59.599074+02:00 rkrell kernel: [  257.590490] nouveau
0000:01:00.0: fifo: gr engine fault on channel 2, recovering...
2016-06-01T10:31:59.599075+02:00 rkrell kernel: [  257.590497] nouveau
0000:01:00.0: gr: TRAP ch 2 [003fbfa000 X[2532]]
2016-06-01T10:31:59.599076+02:00 rkrell kernel: [  257.590514] nouveau
0000:01:00.0: gr: GPC0/TPC0/TEX: 80000049
---

After that, the desktop locks up.
I can reproduce this each time, after a while of working with Chromium, for
example. KDE compositor set to OpenGL 2.0 or 3.1 / GLX.

- Hardware: HP ZBook 15 G2 (GK208), BIOS 01.34, Hybrid Graphics in BIOS set to
Auto
- OS: OpenSUSE Tumbleweed 20160530
- uname -a:
  Linux rkrell 4.5.4-1-default #1 SMP PREEMPT Wed May 11 15:23:21 UTC 2016
(db90c25) x86_64 x86_64 x86_64 GNU/Linux

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