[Nouveau] [Bug 99584] XVMC on nv43 class card broken with recent mesa + kernel.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99584

--- Comment #4 from Ilia Mirkin <imirkin at alum.mit.edu> ---
FWIW with mesa 17.0.1 and kernel 4.10.4, I'm unable to fully reproduce the
issue. I have a NV4A, which uses the nv44 mpeg object, which in turn is rather
different than the "plain" nv40 one which you have.

I get a ton of warnings in dmesg:

[15871.309494] nouveau 0000:09:00.0: mpeg: ch 4 [00060530 mplayer[26300]]
01000000 00000010 000001b0 00006051
[15871.309516] nouveau 0000:09:00.0: mpeg: ch 4 [00060530 mplayer[26300]]
01000000 00000020 00000380 0058b000
[15871.309531] nouveau 0000:09:00.0: mpeg: ch 4 [00060530 mplayer[26300]]
01000000 00000020 0000038c 0068b000
[15871.326326] nouveau 0000:09:00.0: mpeg: ch 4 [00060530 mplayer[26300]]
01000000 00000020 00000380 0058b000
[15871.326356] nouveau 0000:09:00.0: mpeg: ch 4 [00060530 mplayer[26300]]
01000000 00000020 00000384 0000b350
[15871.326371] nouveau 0000:09:00.0: mpeg: ch 4 [00060530 mplayer[26300]]
01000000 00000020 0000038c 0068b000
[15871.326385] nouveau 0000:09:00.0: mpeg: ch 4 [00060530 mplayer[26300]]
01000000 00000020 00000390 000467e8
[15871.372669] nouveau 0000:09:00.0: mpeg: ch 4 [00060530 mplayer[26300]]
01000000 00000020 00000380 0058b000
[15871.372690] nouveau 0000:09:00.0: mpeg: ch 4 [00060530 mplayer[26300]]
01000000 00000020 00000384 000069c0
[15871.372708] nouveau 0000:09:00.0: mpeg: ch 4 [00060530 mplayer[26300]]
01000000 00000020 0000038c 0068b000
[15871.372723] nouveau 0000:09:00.0: mpeg: ch 4 [00060530 mplayer[26300]]
01000000 00000020 00000390 00010604

and so on. The first one is harmless (simple bug that causes it to be printed
instead of hidden), but the rest are harmful. The end-result is random junk on
the screen, but that makes perfect sense given the above errors. I have fixes
for some things, but not others. Will update when I have fixed my setup.

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