From time to time a running application gets stuck in fullscreen mode. This has happened to me even in software that does not support fullscreen mode, like Spotify. Usually when that happens I used to
kill the process and restart it, but there is a way of fixing it without being forced to restart the application.
We can use
wmctrl for that.
wmctrl is a command that can be used to interact with an X Window manager that is compatible with the EWMH/NetWM specification. wmctrl can query the window manager for information, and it can request that certain window management actions be taken.
wmctrl wont’t work with Wayland applications.
First we need to list all applications with
wmctrl -l to get the name of the one stuck.
$> wmctrl -l
0x00c00003 1 fedora Spotify
Now we have to modify the
fullscreen property of the application, for that we’ll use
$> wmctrl -r Spotify -b toggle,fullscreen
-r to specify the application we are going to modify and
-b to tell
wmctrl the action (
toggle) and the property (
fullscreen) to be modified.
With that the application should be back to windowed mode.