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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 - GLBenchmark 2.7 TRex renders with artifacts on Gen8 with SNA"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88521">bug 88521</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Component</td>
<td>Driver/intel
</td>
<td>Drivers/DRI/i965
</td>
</tr>
<tr>
<td style="text-align:right;">Version</td>
<td>unspecified
</td>
<td>git
</td>
</tr>
<tr>
<td style="text-align:right;">Assignee</td>
<td>chris@chris-wilson.co.uk
</td>
<td>idr@freedesktop.org
</td>
</tr>
<tr>
<td style="text-align:right;">Product</td>
<td>xorg
</td>
<td>Mesa
</td>
</tr>
<tr>
<td style="text-align:right;">QA Contact</td>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - GLBenchmark 2.7 TRex renders with artifacts on Gen8 with SNA"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88521#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - GLBenchmark 2.7 TRex renders with artifacts on Gen8 with SNA"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88521">bug 88521</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>Ok, I spotted the corruption - it seems easiest to spot watching just below
halfway down the screen as a green/brown rope extending across the scene.
That is not the corruption I was thinking of and is internal to mesa. It might
be the same GEN8_3DSTATE_VF_INSTANCING pollution but in reverse?
i.e. commit 0532a3313ad9c76a6e1d28e8a1c2ea495583fead
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Wed Nov 5 20:11:54 2014 +0000
sna/gen8: Clear instancing enabled bit between batches
gen8 sets the instancing bit relative to the vertex element, but we were
clearing it for the vertex buffer. As the maximum number of vertex
elements is fixed, just clear them all when emitting our header. Note
that VF_SGVS is not sufficient by itself to disable all side-effects of
instancing.
Thanks to Kenneth Graunke for pointing out the change from vertex buffer
to vertex element of the instancing enable bit.
Bugzilla: <a class="bz_bug_link
bz_status_VERIFIED bz_closed"
title="VERIFIED FIXED - [BDW] Screen stop at certain frame when running Synmark2 cases while FPS is updating"
href="show_bug.cgi?id=84958">https://bugs.freedesktop.org/show_bug.cgi?id=84958</a>
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>></pre>
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