[Bug 56041] New: Disabling LCD on ARUBA causes hotplug loop

[Bug 56041] New: Disabling LCD on ARUBA causes hotplug loop

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=56041

           Summary: Disabling LCD on ARUBA causes hotplug loop
           Product: Drivers
           Version: 2.5
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
        ReportedBy: darktjm@gmail.com
        Regression: No


My hardware:  a Gateway/Acer laptop with Radeon HD 7640G.  Disabling the LCD
(xrandr --output eDP --off) while the external display is being used causes
some sort of hotplug event loop.  100% of one CPU's worth of CPU time is
consumed, and X freezes every few seconds.  For now, I have worked around by
commenting out "queue_hotplug = true" in evergreen.c (case 0).

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[Bug 56041] Disabling LCD on ARUBA causes hotplug loop

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=56041





--- Comment #1 from Alex Deucher <alexdeucher@gmail.com>  2013-04-11 16:47:24 ---
Created an attachment (id=98191)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=98191)
Possible fix

Does the attached kernel patch help?

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[Bug 56041] Disabling LCD on ARUBA causes hotplug loop

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=56041


Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com




--- Comment #2 from Alex Deucher <alexdeucher@gmail.com>  2013-04-11 16:48:10 ---
Make sure you power off your system completely before testing to make sure
there are no residual register values.

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[Bug 56041] Disabling LCD on ARUBA causes hotplug loop

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=56041





--- Comment #3 from Thomas J. Moore <darktjm@gmail.com>  2013-04-12 03:43:14 ---
Yes, that seems to have fixed it.  Thanks.

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