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<body><span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [byt] GPU hang when mplayer playing video with SNA"
href="https://bugs.freedesktop.org/show_bug.cgi?id=69869">bug 69869</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<tr>
<td style="text-align:right;">Summary</td>
<td>[HSW/Baytrail-M bisected] GPU hang when mplayer playing video with SNA
</td>
<td>[byt] GPU hang when mplayer playing video with SNA
</td>
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [byt] GPU hang when mplayer playing video with SNA"
href="https://bugs.freedesktop.org/show_bug.cgi?id=69869#c24">Comment # 24</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [byt] GPU hang when mplayer playing video with SNA"
href="https://bugs.freedesktop.org/show_bug.cgi?id=69869">bug 69869</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>Found the Haswell bug,
commit 68cef6cd281572fcfb76a341dc45b7c8e5baffe6
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Thu Nov 7 13:09:25 2013 +0000
sna/gen7: Request secure batches for Haswell vsync
Since commit 8ff8eb2b38dc705f5c86f524c1cd74a811a7b04c
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Mon Sep 9 16:23:04 2013 +0100
sna/hsw: Scanline waits require both DERRMR and forcewake
we have been emitting LRI to enable vsync on the render ring. This
requires a privileged batch buffer, and whilst we were checking for
kernel support, we forgot to actually tell the kernel to submit the
batch with the right privileges.
Bugzilla: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [HSW] Stuck scanline wait on render"
href="show_bug.cgi?id=71328">https://bugs.freedesktop.org/show_bug.cgi?id=71328</a>
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
The baytrail symptoms are very similar (the LRIs are not landing) but the
hardware implementation is completely difference (and the software doesn't have
the same bug as haswell unfortunately.)</pre>
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