[Bug 58121] New: Radeon SUMO: LVDS panel blanks when enabling external monitor

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=58121

           Summary: Radeon SUMO: LVDS panel blanks when enabling external
                    monitor
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.9
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri at kernel-bugs.osdl.org
        ReportedBy: niels_ole at salscheider-online.de
        Regression: No


Created an attachment (id=101411)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=101411)
dmesg with drm.debug=4

When I enable both my LVDS panel and an external monitor (e.g. DP or VGA), my
LVDS panel blanks.
This is on a radeon SUMO GPU (AMD A6-3410MX APU).
I have attached the dmesg output with drm.debug=4 and my Xorg.0.log.

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