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

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=46711

--- Comment #23 from martin f. krafft <bugs.freedesktop.org at pobox.madduck.net> ---
I am also seeing this problem on Debian Sid with a new Radeon R9 390 card and
two Samsung monitors connected with DisplayPort. The third monitor on DVI works
just fine.

Here's the card:

  06:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Hawaii PRO [Radeon R9 290] (rev 80)

  Kernel is version 4.4.0 (amd64)
  X.org is version 7.7
  Radeon driver is version 7.6.1

Restarting X.org does *not* turn the monitors/displays on. They are in a really
weird state: not flashing as to indicate power-saving, but completely
blank/dark, and I can't even call up the OSD menu.

The only way to get these displays to work is to disconnect the DP cable, turn
them off and on, and then connect the DP cable again.

Here is abridged xrandr output:

Screen 0: minimum 320 x 200, current 5888 x 1152, maximum 16384 x 16384
DisplayPort-0 connected 1920x1080+0+0 (normal left inverted right x axis y
axis) 477mm x 268mm
   1920x1080     60.00*+  59.94  
   […]
DisplayPort-1 connected 1920x1080+3968+0 (normal left inverted right x axis y
axis) 477mm x 268mm
   1920x1080     60.00*+  59.94  
   […]
DisplayPort-2 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DVI-0 connected primary 2048x1152+1920+0 (normal left inverted right x axis y
axis) 510mm x 287mm
   1920x1080     60.00 +  50.00    59.94  
   2048x1152     59.91*+
   […]

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/dri-devel/attachments/20160324/857c8ab2/attachment.html>