[Bug 108854] [polaris11] - GPU Hang - ring gfx timeout

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108854

--- Comment #14 from Tom Seewald <tseewald at gmail.com> ---
(In reply to Tom St Denis from comment #13)
> The wave dump seems to be empty... Is that the complete output?  Was there
> anything printed to stderr (like there are no waves)?

Yes it says "no active waves!" - so it makes sense that is empty.  Is there
something else you'd like me to try? 

Currently I'm running "umr -i 1 -O verbose,halt_waves -wa" immediately after I
see the "ring gfx timeout" in dmesg.  I also just rebuilt UMR so I should be up
to date.

Some potentially good news though, after upgrading from mesa 18.3.1 to 18.3.3,
I have not been able to reproduce the issue. On mesa 18.3.1 and earlier I can
reproduce it in under 20 seconds (I did so today on the latest
amd-staging-drm-next), and I have tested mesa 18.3.3 for about an hour now.

But I believe this is still something to look into as user space should
probably not be able to hang the entire system, even if the user is running an
older version of Mesa.

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