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 <mattst88@gmail.com> 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 <ian.d.romanick@intel.com> Reproduce steps: ----------------------------------------------------------------------------- 1. xinit& 2. google-chrome-stable --enable-webgl --ignore-gpu-blacklist --user-data-dir http://tinderbox.sh.intel.com/webglsamples.googlecode.com/hg/dynamic-cubemap/dynamic-cubemap.html
Created attachment 95079 [details] webgl.png
Created attachment 95080 [details] Xorg.0.log
It's OK on upstream now, fixed by commit 025d99ce3cea21c9ecea77b95655c0c838b2fa3c Author: Matt Turner <mattst88@gmail.com> Date: Mon Feb 10 12:09:19 2014 -0800 glsl: Do not vectorize vector array dereferences.
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