https://bugs.freedesktop.org/show_bug.cgi?id=105117

--- Comment #1 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to rcoe from comment #0)
> [  852.947765] nouveau 0000:01:00.0: gr: DATA_ERROR 0000000c
> [INVALID_BITFIELD] ch 11 [003f7f0000 WebKitWebProces[8594
> ]] subc 0 class 9197 mthd 0808 data 200203fd
> [  852.947775] nouveau 0000:01:00.0: fifo: PBDMA0: 00040000 [] ch 11
> [003f7f0000 WebKitWebProces[8594]] subc 0 mthd 23
> 90 data 3f000000

Feels like a multithreading issue. 808 is RT[0].HORIZ, however the value,
200203fd feels like a pushbuf command. This can happen if the application tries
to invoke gl* calls from multiple threads.

[This is a long-standing issue in nouveau, and not one that's going to be
addressed anytime soon.]

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