[Bug 93341] GPU lockups on RadeonHD 7770 (radeonsi driver) when running OpenGL games or after extended periods of time

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Comment # 9 on bug 93341 from
Hi Nicolai, it's more the lack of response that bothered me after half a year,
I was really looking forward to providing any information that might be needed
to investigate this bug, but trying to work for six months with a workstation
that can hardlock at any time is really painful :)

I can see now that it is a somewhat non-deterministic bug indeed. I have been
using the latest version of Firefox (v47+) on Fedora 23 and 24 today to trigger
the bug easily (usually within 3-10 minutes) by having these pages open all at
the same time (what better torture test than a bunch of WebGL demos!):

- appear.in/fdo93341
- demo.f4map.com
- bongiovi.tw/projects/particlesValley/
- jayweeks.com/medusae/

...with a RadeonHD 2600 (instead of the 7770) the bug does not occur so far,
but that's a completely different series (r600 instead of radeonsi) so I'm not
surprised.

FWIW, this Dell workstation-class computer has a pretty powerful PSU (525w)
compared to the one of the previous computer I was on with the Radeon 7770
(which had a 350w PSU). I measured the GPU's temperatures at all times (nothing
unusual going on), tried different PCI-E slots (since my workstation has two),
no luck...


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