[Bug 78731] New: Screen gets corrupted when using external monitor on T61

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=78731

            Bug ID: 78731
           Summary: Screen gets corrupted when using external monitor on
                    T61
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.15
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: martin.stolpe at gmail.com
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Created attachment 140651
  --> https://bugzilla.kernel.org/attachment.cgi?id=140651&action=edit
Output from lspci

Hello,

I have a T61 notebook with an integrated Intel graphics card. When using the
3.15 kernel the screen gets corrupted during modesetting. Reverting to 3.14
resolves the problem. Bisecting the kernel shows that the error was introduced
in [1ad292b51e358c8b6e9b8966889c21f1fe705489] drm/i915: get_plane_config for
i9xx v13.

The internal notebook monitor is connected via LVDS and the external monitor is
connected via a DVI connector on the docking station.

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