I am confronted with a problem when connecting the external monitor while the computer is open.
At that point it seems that xrandr adopts one of the combinations that do not work.
As a workaround to the other larger problem, I want to be able to modify the default display settings that xrandr has upon connecting the external monitor while the computer is running. (So that I may put a setting that avoids the problem: either by a combination of resolutions that works, or by starting just one of the monitors).
If I connect the external monitor before starting the system, xrandr selects mirror display at a certain rather low resolution that works.
Update:
xrandr
Screen 0: minimum 320 x 200, current 1360 x 768, maximum 4096 x 4096
VGA-0 connected 1360x768+0+0 (normal left inverted right x axis y axis) 580mm x 320mm
1360x768 60.0*+
1280x720 60.0
1024x768 60.0
800x600 60.3
640x480 60.0
DVI-0 disconnected (normal left inverted right x axis y axis)
LVDS connected (normal left inverted right x axis y axis)
1680x1050 60.1 +
1400x1050 60.0
1280x1024 59.9
1440x900 59.9
1280x960 59.9
1280x854 59.9
1280x800 59.8
1280x720 59.9
1152x768 59.8
1024x768 59.9
800x600 59.9
848x480 59.7
720x480 59.7
640x480 59.4
S-video disconnected (normal left inverted right x axis y axis)
When I connect the external desktop I want to use it at its best resolution (which, considering my other problem, excludes the use of the internal monitor). I can set from GUI the resolution for dual monitor. But upon connecting the cable for the external monitor, I want the internal to go off and the external to have 1360×768 – just like they were when I ran the xrandr
command above.
Best Answer
I don't know exactly how to write a default setting for
xrandr
when you connect an external monitor, but you can easily write a custom script and then associate it to a shortcut key, such asmeta + P
.Example
Then associate some shortcut to
/usr/bin/custom-xrandr
and every time you connect an external monitor just press that keys.This should achieve exactly what you want.