[Nouveau] [Bug 99068] Screen hangs when running a 3D app. GTX 660

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99068

--- Comment #10 from Ben Skeggs <skeggsb at gmail.com> ---
(In reply to Nicolás Luciano Bértolo from comment #7)
> What happens is that the file is actually there, but it is 0 bytes long.
> 
> This is the script that I am using to extract the files:
> 
> #! /bin/bash
> 
> rmmod nvidia_drm
> rmmod nvidia_modeset
> rmmod nvidia
> 
> echo 64000 > /sys/kernel/debug/tracing/buffer_size_kb
> echo mmiotrace > /sys/kernel/debug/tracing/current_tracer
> cat /sys/kernel/debug/tracing/trace_pipe > mmiotrace.log &
> 
> modprobe nvidia
> 
> xinit -e sh -c "glxgears & sleep 10"
> 
> sleep 5
> echo nop > /sys/kernel/debug/tracing/current_tracer
> wait
> 
> This line fails:
> echo nop > /sys/kernel/debug/tracing/current_tracer
> It outputs: Resource or device busy.

That's normal, you need to kill the 'cat' process first.

Can you share your resulting trace please, I'll try and see what's different vs
my (working) board.

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