[Bug 63620] New: [Hasell] VGA screen become black when we change screen resolution rate sometimes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=63620

          Priority: medium
            Bug ID: 63620
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [Hasell] VGA screen become black when we change screen
                    resolution rate sometimes
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: xiong.y.zhang at intel.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 78122
  --> https://bugs.freedesktop.org/attachment.cgi?id=78122&action=edit
error message when screen is black

SharkBay(Desktop):
BIOS:HSWLPTU1.86C.0092.R02.1209220303
Kernel: drm-next-queue
        commit e7f8dc57552838fe715201d4493ccec9b0c8bc4b
        Author: Daniel Vetter <daniel.vetter at ffwll.ch>
        Date:   Thu Apr 11 20:22:50 2013 +0200

        drm/i915: don't check inconsistent modeset state when force-restoring
OS: Ubuntu Raring Ringtail (development branch)

SharkBay(Mobile):
BIOS:HSWLPTU1.86C.0097.R00.1210222040
Kernel: drm-next-queue
        commit e7f8dc57552838fe715201d4493ccec9b0c8bc4b
        Author: Daniel Vetter <daniel.vetter at ffwll.ch>
        Date:   Thu Apr 11 20:22:50 2013 +0200

        drm/i915: don't check inconsistent modeset state when force-restoring
OS: Ubuntu Raring Ringtail (development branch)

Details:
Connecting a VGA screen on above platforms, change screen's resolution rate
continually between 1024X768 and 800X600, sometimes screen will become black at
the rate of 20%, then there is error message in dmesg.

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