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<body><span class="vcard"><a class="email" href="mailto:kenneth@whitecape.org" title="Kenneth Graunke <kenneth@whitecape.org>"> <span class="fn">Kenneth Graunke</span></a>
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<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [KBL] portal2_linux GPU hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104487">bug 104487</a>
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<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
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<td style="text-align:right;">Status</td>
<td>ASSIGNED
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<td>RESOLVED
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [KBL] portal2_linux GPU hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104487#c11">Comment # 11</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [KBL] portal2_linux GPU hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104487">bug 104487</a>
from <span class="vcard"><a class="email" href="mailto:kenneth@whitecape.org" title="Kenneth Graunke <kenneth@whitecape.org>"> <span class="fn">Kenneth Graunke</span></a>
</span></b>
<pre>Should be fixed by:
commit 3e18c53e59457f585de217208e1745f2683be0b9
Author: Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>>
Date: Wed Jan 17 14:16:04 2018 -0800
i965: Bind null render targets for shadow sampling + color.
Portal 2 appears to bind RGBA8888_UNORM textures to a sampler2DShadow,
and calls shadow2D() on it. This causes undefined behavior in OpenGL.
Unfortunately, our sampler appears to hang in this scenario, which is
not acceptable. Just give them a null surface instead, which returns
all zeroes.
Fixes GPU hangs in Portal 2 on Kabylake.
Huge thanks to Jason Ekstrand for noticing this crazy behavior while
sifting through crash dumps.
Cc: <a href="mailto:mesa-stable@lists.freedesktop.org">mesa-stable@lists.freedesktop.org</a>
Bugzilla: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [KBL] portal2_linux GPU hang"
href="show_bug.cgi?id=104487">https://bugs.freedesktop.org/show_bug.cgi?id=104487</a>
Reviewed-by: Topi Pohjolainen <<a href="mailto:topi.pohjolainen@intel.com">topi.pohjolainen@intel.com</a>>
Reviewed-by: Jason Ekstrand <<a href="mailto:jason@jlekstrand.net">jason@jlekstrand.net</a>>
Thanks again for the bug report and testing those patches!</pre>
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