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k0tb4tzen

Member

Registered: 2013-11-12

Posts: 32

DisplayPort monitor doesn't wake up when turned off and on again

I have a Dell U2515h connected via DP to my Radeon R9 280X with radeon driver.

When I turn the display off with the hardware button and turn it back on, I don't get an output from the default screen - but the framebuffer console works.

The normal set up looks like this:

$ xrandr -q
Screen 0: minimum 320 x 200, current 2560 x 1440, maximum 16384 x 16384
DisplayPort-0 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 553mm x 311mm
   2560x1440     59.95*+
   2048x1152     60.00  
   1920x1200     59.88  
   1920x1080     60.00    50.00    59.94    30.00    25.00    24.00    29.97    23.98  
   1920x1080i    60.00    50.00    59.94  
   1600x1200     60.00  
   1680x1050     59.95  
   1280x1024     75.02    60.02  
   1200x960      59.99  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.08    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x576i      50.00  
   720x480       60.00    59.94  
   720x480i      60.00    59.94  
   640x480       75.00    60.00    59.94  
   720x400       70.08

While I don't have an output, I get the following:

$ xrandr -d :0 -q
Screen 0: minimum 320 x 200, current 320 x 200, maximum 16384 x 16384
DisplayPort-0 connected primary (normal left inverted right x axis y axis)
   2560x1440     59.95 +
   2048x1152     60.00  
   1920x1200     59.88  
   1920x1080     60.00    50.00    59.94    30.00    25.00    24.00    29.97    23.98  
   1920x1080i    60.00    50.00    59.94  
   1600x1200     60.00  
   1680x1050     59.95  
   1280x1024     75.02    60.02  
   1200x960      59.99  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.08    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x576i      50.00  
   720x480       60.00    59.94  
   720x480i      60.00    59.94  
   640x480       75.00    60.00    59.94  
   720x400       70.08

$ xrandr -d :0 --output DisplayPort-0 --mode 2560x1440
xrandr: Configure crtc 0 failed.

Even with the --crtc option and  0..5 as parameters (as shown with xrandr -q --verbose | grep CRTCs) this doesn't work.

So how do I turn the screen back on, preferrably automatically? In Windows this just works™.

Last edited by k0tb4tzen (2015-06-18 21:54:29)

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rооt

Member

From: Ukraine

Registered: 2015-06-20

Posts: 5

Re: DisplayPort monitor doesn't wake up when turned off and on again

it seems problem in KScreen5
https://bugs.kde.org/show_bug.cgi?id=340267

k0tb4tzen

Member

Registered: 2013-11-12

Posts: 32

Re: DisplayPort monitor doesn't wake up when turned off and on again

I don't use KDE, kscreen isn't installed.

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