[Bug 110394] Skylake GPU HANG while gstreamer H264 vaapi encoding from MJPEG vaapi decode on drm-tip

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https://bugs.freedesktop.org/show_bug.cgi?id=110394

--- Comment #21 from Andy Nicholas <andy.nicholas at shield.ai> ---
Created attachment 143954
  --> https://bugs.freedesktop.org/attachment.cgi?id=143954&action=edit
GPU hang #9 after coarse power gating disabled, machine .36

Ok, I will try the fc6 disable suggestion shortly. Will take a few hours to run
and cause trouble.

This is a hang from the 2nd compute stick which hung after 257 transcode
iterations using the same source MJPEG movie.

We have 2 compute sticks which seem to reliably show these problems. One is in
San Diego at my work. The other is here in San Jose, Bay Area with me. We made
a CloneZilla image of the compute stick to see if it would hang and it did
after about 650 iterations (e.g., 650 minutes).

I am told that CloneZilla can only really restore to device of similar size, so
if you had an m5 compute stick (STK2mv64cc) we could put the 5GB image on a
server for you. There's nothing confidential from shield. It's a stock 18.04
image with my home-made MJPEG movie. If necessary we can Fedex a compute stick
which demonstrates the problem.

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