[Bug 46711] Monitor not turning on after DisplayPort re-plug in Xorg

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Apr 16 08:25:12 PDT 2012


--- Comment #7 from Alex Deucher <agd5f at yahoo.com> 2012-04-16 08:25:12 PDT ---
(In reply to comment #6)
> How to investigate this potential conflict with userspace?
> Because, as I originally wrote, without X running monitor comes back fine.

It's probably missing locking in the radeon kernel modesetting code.  The ddx
registers an event handler in the xserver and then the desktop environment does
something with the event.  See drmmode_uevent_init() and
drmmode_handle_uevents() in drmmode_display.c in xf86-video-ati.

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