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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Tonga powerplay isssues"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92936#c14">Comment # 14</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Tonga powerplay isssues"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92936">bug 92936</a>
from <span class="vcard"><a class="email" href="mailto:adf.lists@gmail.com" title="Andy Furniss <adf.lists@gmail.com>"> <span class="fn">Andy Furniss</span></a>
</span></b>
<pre>Been testing vce and there is an issue with auto.
This is not just this kernel, I've been back and now I have a script to test
lots of runs, I can reproduce on older kernels + current fixes as well.
The issue is that it will hang, at this time I am apparently OK in that I can
use desktop normally. There is no hung task timeout. If I kill the gstreamer
process it won't return, then I may get a hung task trace.
Whether I kill gstreamer or not, quitting X or a VT switch will lock up
display.
This only happens when
/sys/class/drm/card0/device/power_dpm_force_performance_level is auto.
If it's high or low I can repeatedly run vce encodes OK - I have tested > 1000.
On this kernel and fixes it only takes < 5 runs to lock with the same test.
On an older kernel it lasted for 25 runs (which is I guess why I didn't hit it
in "normal" testing + I often forced high for bench marking anyway)</pre>
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