Nouveau - Nov 2015 - [Bug 92971] [GF110] KDE plasma locks randomly due to crash of nouveau driver

https://bugs.freedesktop.org/show_bug.cgi?id=92971

--- Comment #6 from Philippe Condé <conde.philippe at skynet.be> ---
Hello,

I tested with the non Xen kernel vmlinux-4.3.0-1-default.
The crash exists also with this kernel

here the journalctl output with a crash when loading a page in the browser: The
screen was totally corrupted but I succeeded to go the the console CTRL Alt F1
and could load top ==> plasmashell (PID 2358) was running with 100%. 

I tried to shutdown but the system locked (I did not see any shutdown messages
and did a hard reset)

Nov 17 13:21:23 hpprol2 login[1943]: ROOT LOGIN ON tty1
Nov 17 13:22:02 hpprol2 kernel: nouveau 0000:0a:00.0: plasmashell[2358]: failed
to idle channel 0xcccc0000 [plasmashell[2358]]
Nov 17 13:22:15 hpprol2 systemd-logind[1141]: Power key pressed.
Nov 17 13:22:17 hpprol2 kernel: nouveau 0000:0a:00.0: plasmashell[2358]: failed
to idle channel 0xcccc0000 [plasmashell[2358]]
Nov 17 13:22:23 hpprol2 kernel: nouveau 0000:0a:00.0: Xorg[2019]:
nv50cal_space: -16

The last line was repeated many times 
thereafter are some lines related to the shutdown which end with
Nov 17 13:22:56 hpprol2 display-manager[4671]: Shutting down service kdm..done
Nov 17 13:23:06 hpprol2 kernel: nouveau 0000:0a:00.0: xembedsniproxy[2424]:
failed to idle channel 0xcccc0000 [xembedsniproxy[2424]]
Nov 17 13:23:21 hpprol2 kernel: nouveau 0000:0a:00.0: xembedsniproxy[2424]:
failed to idle channel 0xcccc0000 [xembedsniproxy[2424]]
Nov 17 13:23:30 hpprol2 systemd-logind[1141]: Power key pressed.


can it be the plasmashell which start a crash in nouveau driver?

Regards
Philippe

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