[NVC1] Attempt to use kde/plasma renders the system immediately unresponsive
Submitted by Alexander Dubov
Assigned to Nouveau Project
Description
Created attachment 122538 Xorg.0.log for the failed session
The crux of the problem:
Mar 25 23:40:25 mercador kernel: nouveau 0000:01:00.0: plasmashell[6208]: failed to idle channel 17 [plasmashell[6208]] Mar 25 23:40:27 mercador kernel: nouveau 0000:01:00.0: timeout at drivers/gpu/dr m/nouveau/nvkm/engine/fifo/gpfifogf100.c:66/gf100_fifo_gpfifo_engine_fini()! Mar 25 23:40:27 mercador kernel: nouveau 0000:01:00.0: fifo: channel 17 [plasmas hell[6208]] kick timeout Mar 25 23:40:27 mercador kernel: nouveau: plasmashell[6208]:00000000:0000906f: d etach gr failed, -16 Mar 25 23:40:27 mercador kernel: nouveau 0000:01:00.0: fifo: SCHED_ERROR 0d [] Mar 25 23:40:29 mercador kernel: nouveau 0000:01:00.0: timeout at drivers/gpu/dr m/nouveau/nvkm/engine/fifo/gpfifogf100.c:66/gf100_fifo_gpfifo_engine_fini()! Mar 25 23:40:29 mercador kernel: nouveau 0000:01:00.0: fifo: channel 17 [plasmas hell[6208]] kick timeout Mar 25 23:40:29 mercador kernel: nouveau: plasmashell[6208]:00000000:0000906f: d etach sw failed, -16 Mar 25 23:40:44 mercador kernel: nouveau 0000:01:00.0: plasmashell[6208]: failed to idle channel 17 [plasmashell[6208]]
This will happen immediately upon any interaction with KDE 5 panel.
At this moment system is rendered inoperable, even though it may still possible to reboot it over network. The CPU usage becomes high, apparently being consumed by an in-kernel thread.
The kernel version is 4.4.6 Kde/plasma version is 5.19.0, qt is 5.5.1 X11/nouveau driver version is 1.0.12
Xorg.0.log is attached (with some additional errors signalling that event queue is filling up).
Attachment 122538, "Xorg.0.log for the failed session":
Xorg.0.log
Version: 11.1