I have a laptop that I plug into a docking station on a daily basis. And almost every time, I need to modify my plasma-org.kde.plasma.desktop-appletsrc, then do a plasma restart kquitapp5 plasmashell && kstart plasmashell. As per this.
The problem I have, is that at one point, I could mostly automate this since typically I just needed to toggle the lastScreen value between 2 and 3 for one panel. Sadly something has changed in the last couple of months, and now, I need to modify lastScreen for both panels for my 2 external monitors, and the numbers can range from 0-4.
What I'd like to know, is if there is some way to determine which monitor is currently set to which number. Ideally it would be a command line value I could read programmatically to feed into a script. But even just a way to show the number on each monitor would save me time trying multiple combinations.
I'm running Kubuntu 18.04.
For info currently xrandr --listmonitors shows:
Monitors: 2 0: +DP-1-2 1920/518x1200/324+0+0 DP-1-2 1: +DP-2-2 1920/518x1200/324+1920+0 DP-2-2 while my plasma-org.kde.plasma.desktop-appletsrc currently shows for DP-1-2
[Containments][54] activityId= formfactor=2 immutability=1 lastScreen=0 location=4 plugin=org.kde.panel wallpaperplugin=org.kde.image and shows for DP-2-2
[Containments][63] activityId= formfactor=2 immutability=1 lastScreen=4 location=4 plugin=org.kde.panel wallpaperplugin=org.kde.image 1 Answer
Check ~/.config/plasmashellrc, it should have a [ScreenConnectors] section that maps lastScreen numbers to xrandr names:
[ScreenConnectors] 0=DisplayPort-0 1=DisplayPort-1 Those DisplayPort names match my xrandr output:
$ xrandr --listmonitors Monitors: 2 0: +*DisplayPort-0 1920/518x1200/324+0+0 DisplayPort-0 1: +DisplayPort-1 1920/518x1200/324+1920+0 DisplayPort-1 (I'm on Kubuntu 20.04)
If you're hand-editing plasmashellrc save the file & do a quick
kquitapp5 plasmashell && kstart5 plasmashell ...to restart Plasma reasonably cleanly.
