[Bug 29941] New: radeon/KMS: Screen hotplugging does not work any more

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https://bugs.freedesktop.org/show_bug.cgi?id=29941

           Summary: radeon/KMS: Screen hotplugging does not work any more
           Product: DRI
           Version: DRI CVS
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@xxxxxxxxxxxxxxxxxxxxx
        ReportedBy: direx@xxxxxxxxxxxxxxxxxxx


I noticed that in recent kernel versions the runtime detection of newly added
monitors does not work properly.

When I plug in my TV (DVI2HDMI) after booting I cannot enable it. xrandr
correctly shows a new screen and I can even enable the output, but the TV
screen stays black. Restarting X does not help.

The driver also seems to recognize the port status after plugging it in
(/sys/class/drm/card0-DVI-I-2/status) changes from "disconnected" to
"connected".

When I plug the HDMI cable in _before_ booting my computer the TV works just
fine.

GFX: Radeon HD 3870
Linux: 2.6-git (issue appeared in 2.6.35) with KMS
Mesa: git
libdrm: git
xf86-video-ati: git

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