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Some programs that I run in playonlinux don't exit nicely. So I want to insert a script so that when the game exits it'll run xrandr -s 0.  I think I can work this as a batch command but I don't know how to work it with the Playonlinux gui.

Hi,

There's no support for that in the GUI (but you can use a hack, see below), from either install scripts or manually you have to add your statement at the end of the shortcut script (that resides in ~/.PlayOnLinux/shortcuts/)

echo 'xrandr -s 0' >> ~/.PlayOnLinux/shortcuts/'Shortcut name'

If the game starts asynchronously you may have to add a "wineserver -w" statement before your xrandr statement.

But if you insist in using the GUI, it can be done with a hack:

Configure button > (select shortcut) > Miscellaneous tab > Commands to run before the program:

trap 'xrandr -s 0' EXIT

Which will run your statement on shortcut exit, achieving the same thing