[Nouveau] [Bug 75464] [nv4e] [vdpau] causes hangs

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75464

--- Comment #3 from Nick Lee <nvlbox at gmail.com> ---
Causes hangs when I seeking (pressing key left/right in mpv) with this error:

13:16:53.084345 zotac kernel: nouveau 0000:03:00.0: Xwayland[2069]: failed to
idle channel 25 [Xwayland[2069]]
13:17:08.078712 zotac kernel: nouveau 0000:03:00.0: Xwayland[2069]: failed to
idle channel 25 [Xwayland[2069]]
13:17:08.085015 zotac kernel: nouveau 0000:03:00.0: mspdec: intr 00000040
13:17:08.085548 zotac kernel: nouveau 0000:03:00.0: fb: trapped read at
0000000000 on channel 25 [0daa8000 Xwayland[2069]] engine 01 [PVP] client 0c
[PVP] subclient 07 [] reason 0000000f [DMAOBJ_LIMIT]

mpv 0.27.2:
Using hardware decoding (vdpau).
VO: [vdpau] 1280x720 vdpau[yuv420p]
[vo/vdpau] Compositing window manager detected. Assuming timing info is
inaccurate.

NVIDIA Corporation C79 [GeForce 9300 / nForce 730i] (rev b1)

kernel-4.16.0-0.rc3.git2.1.vanilla.knurd.1.fc27.x86_64
mesa-17.3.6

this happens a long time ago.

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