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<body><span class="vcard"><a class="email" href="mailto:chad.versace@linux.intel.com" title="Chad Versace <chad.versace@linux.intel.com>"> <span class="fn">Chad Versace</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - HiZ on SNB causes GPU hang with WebGL web app"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70740">bug 70740</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>ASSIGNED
</td>
<td>RESOLVED
</td>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - HiZ on SNB causes GPU hang with WebGL web app"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70740#c9">Comment # 9</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - HiZ on SNB causes GPU hang with WebGL web app"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70740">bug 70740</a>
from <span class="vcard"><a class="email" href="mailto:chad.versace@linux.intel.com" title="Chad Versace <chad.versace@linux.intel.com>"> <span class="fn">Chad Versace</span></a>
</span></b>
<pre>Fixed by the following commit, at least on Chrome OS. If the patch didn't fix
the hang for your distro, please re-open the bug.
commit 1a928816a1b717201f3b3cc998a42731b280e6ba
Author: Chad Versace <<a href="mailto:chad.versace@linux.intel.com">chad.versace@linux.intel.com</a>>
Date: Fri Dec 20 04:39:03 2013 -0800
i965/gen6: Fix HiZ hang in WebGL Google Maps
Emitting flushes before depth and hiz resolves at the top of blorp's
state emission fixes the hang. Marchesin and I found the fix
experimentally, as opposed to adhering to a documented hardware
workaround. A more minimal fix likely exists, but this gets the job
done.
Fixes HiZ hangs in the new WebGL Google maps on Sandybridge Chrome OS.
Tested by zooming in and out continuously for 2 hours.
This patch is based on
<a href="https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/8bc07bb70163c3706fb4ba5f980e57dc942f56dd">https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/8bc07bb70163c3706fb4ba5f980e57dc942f56dd</a>
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 - HiZ on SNB causes GPU hang with WebGL web app"
href="show_bug.cgi?id=70740">https://bugs.freedesktop.org/show_bug.cgi?id=70740</a>
Signed-off-by: Stéphane Marchesin <<a href="mailto:marcheu@chromium.org">marcheu@chromium.org</a>>
Signed-off-by: Chad Versace <<a href="mailto:chad.versace@linux.intel.com">chad.versace@linux.intel.com</a>>
Reviewed-by: Paul Berry <<a href="mailto:stereotype441@gmail.com">stereotype441@gmail.com</a>>
Reviewed-by: Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>></pre>
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