[Nouveau] [Bug 93629] [NVE6] complete system freeze, PGRAPH engine fault on channel 2, SCHED_ERROR [ CTXSW_TIMEOUT ]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93629

--- Comment #15 from Alexandre Courbot <gnurou at gmail.com> ---
I think I am facing this issue.

Kernel 4.4.5, Arch Linux, GeForce GTX 650 Ti Boost (first time using it).

X will freeze almost immediately (typically right after my KDE session has
loaded) with the following message:

nouveau 0000:01:00.0: fifo: write fault at 00002a2000 engine 00 [GR] client 0f
[GPC1/PROP_0] reason 02 [PTE] on channel 2 [023faf0000 Xorg[666]]
nouveau 0000:01:00.0: fifo: gr engine fault on channel 2, recovering...

If have just booted using the NVIDIA firmware (NvGrUseFW=1), and X is working
fine so far. Will perform a few more boots and spend some time on it to confirm
the issue is solved.

This seems to be a GR firmware issue, any guidance on how I can help fixing it?

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