[Bug 68968] New: [BayTrail-M bisect]gnome-session fails to start

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=68968

          Priority: medium
            Bug ID: 68968
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BayTrail-M bisect]gnome-session fails to start
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: yex.tian at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 85232
  --> https://bugs.freedesktop.org/attachment.cgi?id=85232&action=edit
dmesg.log

Environment:
------------------------------------
Libdrm:    (master)libdrm-2.4.46-34-gd18cd0c7ccf88c9f6585aaa3cc57f0f064d7310b
Mesa:    (master)644fbbd3ebe58ee2237395904f83e085f221d52d
Xserver:(master)xorg-server-1.14.99.1-193-g94d4e29aedc69431fa9b299ca1b67947173d7a24
Xf86_video_intel:(master)2.21.15-67-g47e718bf321f6fe80dc5f797f433b00bc8de91c7
Cairo:    (master)59e2a93b3c8a7b83d537bb2a4bbdd5f0f36a0cbc
Libva:    (staging)9afa699796c1221ee0c188f490d844af4105b447
Libva_intel_driver:(staging)42bb613e72d235bcbe141c906dec9431e4c29661
Kernel: (drm-intel-next-queued) 7a8c0b719b52dfb8ab8daec866c7ca3a5acc8875

Platform:  bay trail –M  
BIOS: V55_31 64bit    
OS: Fedora 19 X86_64

Bug detailed description:
--------------------------
Gnome-session fails to start on BYT-M, this issue happens on
drm-intel-next-queued branch.
By bisected, the first bad commit is b0135d2. 
commit b0135d2b287424cceeebe79ef81fd1e6425509a3
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Mon Aug 26 20:58:12 2013 +0100

drm/i915: Use RCS flips on Ivybridge+

Please see dmesg.log and  Xorg.0.log attached.

Reproduce steps:
----------------------------
1, xinit&
2, gnome-session

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