[Bug 61158] New: [ILK] System hang while running testdisplay to mode 1280x800

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=61158

          Priority: medium
            Bug ID: 61158
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [ILK] System hang while running testdisplay to mode
                    1280x800
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: critical
    Classification: Unclassified
                OS: All
          Reporter: yangweix.shui at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 75163
  --> https://bugs.freedesktop.org/attachment.cgi?id=75163&action=edit
netconsole.log

Environment:
---------------------------
Kernel: (drm-intel-next-queued)bc555a2f669e3386223ba545abba5b2fd0c73d04
Some additional commit info:
Author: Jesse Barnes <jbarnes at virtuousgeek.org>
Date:   Tue Feb 19 12:11:38 2013 -0800

    drm/i915: don't restore LVDS enable state blindly v2

Description:
---------------------------
System will be hang, while it's running to mode 1280x800. I tested many times,
this issue can be reproduced stably. I have appended netconsole.log in
attachment.

CRTS(3):[39]  1280x800 75 1280 1360 1488 1696 800 803 809 838 0x6 0x40 106500

Reducing step:
---------------------------
1. ./testdisplay -a -s 10

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