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[Bug 791752] Re: Can not toggle Display to External only mode

To: ubuntu-x-swat@xxxxxxxxxxxxxxxxxxx
From: Keng-Yü Lin <keng-yu.lin@xxxxxxxxxxxxx>
Date: Mon, 20 Jun 2011 06:39:44 -0000
Reply-to: Bug 791752 <791752@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Some bisecting jobs are done, it seems the following commit fixed the
external mode issue.

commit 47a05eca72991039e788b25232061f9c9df9ec23
Author: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Date:   Mon Feb 7 13:46:40 2011 -0800

    drm/i915: disable PCH ports if needed when disabling a CRTC

    Disable any PCH ports associated with a pipe when disabling it.  This
    should prevent transcoder disable failures due to ports still being on.

    Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
    [ickle: introduce *_PIPE_ENABLED() macro]
    Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>

I put the kernel packages at
http://people.canonical.com/~lexical/bugs/lp791752/ for anyone to test.

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https://bugs.launchpad.net/bugs/791752

Title:
  Can not toggle Display to External only mode

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