[Bug 90865] New: [SKL] ChromiumOS WebGL demo Dynamic Cubemap casue system hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90865

            Bug ID: 90865
           Summary: [SKL] ChromiumOS WebGL demo Dynamic Cubemap casue
                    system hang
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: shuo.wang at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

System Environment:
--------------------------
Platform: SKL ChromiumOS
Libdrm: libdrm-2.4.61-13-g97be70b45eccc37e98a1cecf360593f36956ea42
Mesa: (master)4fd42a7c2798d03476c84b79cb855984a15c222c
Kernel: 4.1.0-rc5_drm-intel-nightly_5267b9_20150527+

Bug detailed description:
-----------------------------
Run WebGL Demo Dynamic Cubemap by SKL chromium for several minutes, then system
hang is occured.
This bug is occured by SKL SPT-H C0 stepping, with Bios B084.R00.
But can not reproduce by SKL PCH-LP B0 stepping, with Bios V85.R00.

Reproduce steps:
---------------------------- 
Open Chromium browser and run WebGL demo Dynamic Cubemap .
chromium-browser --enable-webgl --ignore-gpu-blacklist --user-data-dir
"http://webglsamples.googlecode.com/hg/dynamic-cubemap/dynamic-cubemap.html"

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