I have this problem on 3 Linux distros.
I run games in full-screen and after minimizing them,
The game freezes when I'm trying switch to other window,
Screen (and resolution) stays frozen until I turn off the game.
Then the screen switches resolution back and I can use other windows/programs again.
I have Fedora , my ntb uses Bumblebee + Nvidia drivers (installed through Fedora tutorial "Bumblebee").
Basic recommended Rpm-fusion drivers isn't supported by my graphics card (GeForce GT 730M), even the official drivers by Ge-force though my card is in list of supported cards.
I can't have
xorg.conf file, Gnome can't start with it. It looks like the game takes over the display and locks it.