[Bug 83702] New: [IVB/HSW/BYT-M Bisected]GPU Hang when running some cases

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83702

          Priority: medium
            Bug ID: 83702
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [IVB/HSW/BYT-M Bisected]GPU Hang when running some
                    cases
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: jianx.zhou at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Platform:IVB/HSW/BYT-M
Libdrm:(master)libdrm-2.4.56-21-g8c2ae1695913990cbe6c6a8aa294f354eba33bd0
Mesa:(master)4ea1565bbc49df79d4c39ba5491b0a83c2679a05
Xserver:(master)xorg-server-1.16.0-152-g3a51418b2db353519a1779cf3cebbcc9afba2520
Xf86_video_intel:(master)2.99.916-2-ge0f7e9fc2f0b39b9e939ff48edea29950f125420
Cairo:(master)8e11a42e3e9b679dce97ac45cd8b47322536a253
Libva:(master)e0d25ece01e7aba819c910e98c4fb4706cdab055
Libva_intel_driver:(master)b18479e4fdd7af7cf2840542ef19dbe9114fdeaf
Kernel:(drm-intel-nightly)4a3d32734bdcef6813b31f06a58430436e98711e

Bug detailed description
------------------------------------------------
GPU Hang when running some cases on IVB/HSW/BYT-M,this issue doesn't exist on
BDW.
BTW,This issue fail rate is low on IVB/BYT-M. 
Detail info you can see hsw_dmesg.log and hsw_gpuhang_output.log and Xorg.0.log

It's kernel(drm-intel-next-queued) regression,this issue also exist on
drm-intel-nightly branch,bisected the result show first bad commit:
commit 1ed26b0b84dab119de93723ad646229db748842d
Author:     Michel Thierry <michel.thierry at intel.com>
AuthorDate: Fri Sep 5 14:13:16 2014 +0100
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Mon Sep 8 09:42:19 2014 +0200

    drm/i915: Enable full PPGTT on gen7

Reproduced step:
---------------------------------------------
1. xinit&
2. vblank_mode=0 ./doom.x86 +exec doom3-pts.cfg +set sys_VideoRam 64 +set
r_mode -1 +timedemoquit demo1 +set r_customWidth 1920 +set r_customHeight 1080
+set com_machineSpec 1

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