[Bug 39027] [evergreen] Monitor fails to come back after unplug and replug (recent regression)

[Bug 39027] [evergreen] Monitor fails to come back after unplug and replug (recent regression)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=39027

Thomas Lindroth <thomas.lindroth@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Product|xorg                        |DRI
          Component|Driver/Radeon               |DRM/Radeon
         AssignedTo|xorg-driver-ati@lists.x.org |dri-devel@lists.freedesktop
                   |                            |.org
          QAContact|xorg-team@lists.x.org       |

--- Comment #1 from Thomas Lindroth <thomas.lindroth@gmail.com> 2011-07-07 02:50:21 PDT ---
It is a kernel regression. A bisect on the drivers/gpu folder resulted in the
following likely candidate.

commit 1e85e1d07b9255bd52c557f1a77fb72ccfacaf1c
Author: Alex Deucher <alexdeucher@gmail.com>
Date:   Fri May 20 04:34:29 2011 -0400

    drm/radeon/kms: simplify hotplug handler logic

    In the hotplug handler, just use the drm dpms functions.
    If the monitor is plugged in, turn it on, if it's not,
    turn it off.  This also reduces power usage by turning
    off the encoder and crtc when the monitor is unplugged.

    Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
    Signed-off-by: Dave Airlie <airlied@redhat.com>

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[Bug 39027] [evergreen] Monitor fails to come back after unplug and replug (recent regression)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=39027

--- Comment #2 from Alex Deucher <agd5f@yahoo.com> 2011-07-11 07:48:50 PDT ---
Created an attachment (id=48977)
 View: https://bugs.freedesktop.org/attachment.cgi?id=48977
 Review: https://bugs.freedesktop.org/review?bug=39027&attachment=48977

fix

This patch should fix it.

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[Bug 39027] [evergreen] Monitor fails to come back after unplug and replug (recent regression)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=39027

--- Comment #3 from Thomas Lindroth <thomas.lindroth@gmail.com> 2011-07-11 10:38:01 PDT ---
The provided patch fixed the problem.

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[Bug 39027] [evergreen] Monitor fails to come back after unplug and replug (recent regression)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=39027

--- Comment #4 from Florian Mickler <florian@mickler.org> 2011-07-31 11:45:30 PDT ---
A patch referencing this bug report has been merged in Linux v3.0:

commit cbac9543281f8e813f3ca9186c963a9b55136e93
Author: Alex Deucher <alexdeucher@gmail.com>
Date:   Mon Jul 11 14:49:28 2011 +0000

    drm/radeon/kms: fix regression in hotplug

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[Bug 39027] [evergreen] Monitor fails to come back after unplug and replug (recent regression)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=39027

Alex Deucher <agd5f@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

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