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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [IVB/HSW bisected]WebGL benchmark render error"
href="https://bugs.freedesktop.org/show_bug.cgi?id=75746">75746</a>
</td>
</tr>
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<th>Assignee</th>
<td>idr@freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[IVB/HSW bisected]WebGL benchmark render error
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jianx.zhou@intel.com
</td>
</tr>
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<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Component</th>
<td>Drivers/DRI/i965
</td>
</tr>
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<th>Product</th>
<td>Mesa
</td>
</tr></table>
<p>
<div>
<pre>Platform:IVB/HSW
Libdrm: (master)libdrm-2.4.52-2-gcbb31f2d6e674513c0f66484c414475baba09153
Mesa:(master)e5e4120723f7aa927faadca96910d4e8cbd99f40
Xserver:(master)xorg-server-1.15.0-558-gc1ce807d9f18f215332d7eeb8
Xf86_video_intel:(master)2.99.907-54-g294180b3bf78f2c0ae2f1197e1c
Cairo:(master)2a7f133639bed86a29dd9693cb78c0aa42eaff30
Libva:(staging)79ddde6bab54618046f136471c020c08ff4fde50
Libva_intel_driver:(staging)6736a39fce442a8e5abb2a2e99adf56e3965d35f
Kernel: drm-intel-nightly git-0dfe3c
Bug detailed description:
-----------------------------------------------------------------------------
WebGL benchmark render error on IVB/HSW, The problem exists on both
gnome-session and Raw X.
Please see Xorg.o.log and webgl.png.
It’s Mesa regression, bisecting show that the first bad commit is
4bd6e0d7c69b304be88996a6c2b96ce7d996e627
Author: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
Date: Sat Dec 21 11:28:05 2013 -0800
glsl: Vectorize multiple scalar assignments
Reduces vertex shader instruction counts in DOTA2 by 6.42%, L4D2 by
4.61%, and CS:GO by 5.71%.
total instructions in shared programs: 1500153 -> 1498191 (-0.13%)
instructions in affected programs: 59919 -> 57957 (-3.27%)
Reviewed-by: Ian Romanick <<a href="mailto:ian.d.romanick@intel.com">ian.d.romanick@intel.com</a>>
Reproduce steps:
-----------------------------------------------------------------------------
1. xinit&
2. google-chrome-stable --enable-webgl --ignore-gpu-blacklist --user-data-dir
<a href="http://tinderbox.sh.intel.com/webglsamples.googlecode.com/hg/dynamic-cubemap/dynamic-cubemap.html">http://tinderbox.sh.intel.com/webglsamples.googlecode.com/hg/dynamic-cubemap/dynamic-cubemap.html</a></pre>
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