Arch Linux

Carl Karl

Member

Registered: 2013-06-12

Posts: 231

VGA unplug, replug needs xrandr off, xrandr on since recently

Hello,

I need to plug and unplug my laptop several times a day to an external VGA beamer.
Before recently, I switched on the external VGA (DP1) ONE time by:

xrandr --output eDP1 --mode 1366x768 --output DP1 --mode 1366x768

and no matter how I pluged VGA in and out, the VGA output stayed active and usable.

But since recently, when I unplug VGA and plug it in again, there is no signal at the VGA output. I have to do

xrandr --output eDP1 --mode 1366x768 --output DP1 --off && xrandr --output eDP1 --mode 1366x768 --output DP1 --mode 1366x768

in order to get the VGA output working again.

So I would like to have it still the old way, with VGA output staying on, no matter how I unplug and plug. How can I achieve that?

Reference:

before switching VGA on and pluging in:

$ xrandr
Screen 0: minimum 8 x 8, current 1366 x 768, maximum 32767 x 32767
eDP1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 293mm x 165mm
   1366x768      60.00*+
   1024x768      60.00  
   800x600       60.32    56.25  
   640x480       59.94  
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

after pluging VGA in and activating by

xrandr --output eDP1 --mode 1366x768 --output DP1 --mode 1366x768

:

$ xrandr
Screen 0: minimum 8 x 8, current 1366 x 768, maximum 32767 x 32767
eDP1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 293mm x 165mm
   1366x768      60.00*+
   1024x768      60.00  
   800x600       60.32    56.25  
   640x480       59.94  
DP1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1280x800      59.81 +
   1600x1200     60.00  
   1680x1050     59.95  
   1400x1050     74.87  
   1600x900      60.00  
   1280x1024     75.02  
   1440x900      59.89  
   1280x960      60.00  
   1366x768      59.79* 
   1152x864      75.00  
   1280x720      59.97  
   1024x768      85.00    75.08    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   640x480       75.00    72.81    66.67    60.00  
   720x400       87.85    70.08  
DP2 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

after unpluging VGA:

$ xrandr
Screen 0: minimum 8 x 8, current 1366 x 768, maximum 32767 x 32767
eDP1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 293mm x 165mm
   1366x768      60.00*+
   1024x768      60.00  
   800x600       60.32    56.25  
   640x480       59.94  
DP1 disconnected 1366x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
DP2 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
  1366x768 (0xe1) 85.500MHz
        h: width  1366 start 1436 end 1579 total 1792 skew    0 clock  47.71KHz
        v: height  768 start  771 end  774 total  798           clock  59.79Hz

after repluging VGA without setting xrandr: VGA ouptput (DP1) has NO signal, although:

$ xrandr
Screen 0: minimum 8 x 8, current 1366 x 768, maximum 32767 x 32767
eDP1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 293mm x 165mm
   1366x768      60.00*+
   1024x768      60.00  
   800x600       60.32    56.25  
   640x480       59.94  
DP1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1280x800      59.81 +
   1600x1200     60.00  
   1680x1050     59.95  
   1400x1050     74.87  
   1600x900      60.00  
   1280x1024     75.02  
   1440x900      59.89  
   1280x960      60.00  
   1366x768      59.79* 
   1152x864      75.00  
   1280x720      59.97  
   1024x768      85.00    75.08    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   640x480       75.00    72.81    66.67    60.00  
   720x400       87.85    70.08  
DP2 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

after applying

xrandr --output eDP1 --mode 1366x768 --output DP1 --mode 1366x768

:
nothing changed, output of xrandr as before, no signal on VGA=DP1.

after applying

xrandr --output eDP1 --mode 1366x768 --output DP1 --off && xrandr --output eDP1 --mode 1366x768 --output DP1 --mode 1366x768

:
VGA=DP1 signal is there again, and:

$ xrandr
Screen 0: minimum 8 x 8, current 1366 x 768, maximum 32767 x 32767
eDP1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 293mm x 165mm
   1366x768      60.00*+
   1024x768      60.00  
   800x600       60.32    56.25  
   640x480       59.94  
DP1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1280x800      59.81 +
   1600x1200     60.00  
   1680x1050     59.95  
   1400x1050     74.87  
   1600x900      60.00  
   1280x1024     75.02  
   1440x900      59.89  
   1280x960      60.00  
   1366x768      59.79* 
   1152x864      75.00  
   1280x720      59.97  
   1024x768      85.00    75.08    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   640x480       75.00    72.81    66.67    60.00  
   720x400       87.85    70.08  
DP2 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)