[Nouveau] [Bug 76818] [NVE7] GPU lockup

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76818

Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Xorg EQ overflowing lock up |[NVE7] GPU lockup

--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
It's more common to attach logs... otherwise the bug reports become very
unwieldy to read.

[ 1743.737807] nouveau ![   PFIFO][0000:01:00.0] unhandled status 0x00800000
[ 8543.865800] nouveau E[     DRM] GPU lockup - switching to software fbcon
[ 8558.870800] nouveau E[  X[808]] failed to idle channel 0xcccc0001 [X[808]]

The unhandled PFIFO bit comes _way_ earlier than the gpu lockup... so probably
unrelated.

The fact that X segfaults when the GPU locks up is a little unfortunate, but
right now this situation is completely unhandled by the userspace stack in any
case. Ideally the GPU wouldn't lock up :)

A quick and easy thing to try is blob pgraph firmware instead of nouveau's.
Take a look at http://nouveau.freedesktop.org/wiki/VideoAcceleration/#firmware
for a quick and easy way to get it (yes, I know it says it's for hw video
decoding accel, but the script extracts all fw). Follow those instructions and
add

nouveau.config=NvGrUseFw=1

to the kernel command line (or when loading the nouveau module); make sure that
the firmware files are available when the nouveau module loads (so if it loads
from your initrd, they need to be in your initrd).

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