https://bugs.freedesktop.org/show_bug.cgi?id=91342
--- Comment #1 from Michel Dänzer michel@daenzer.net --- (In reply to acutiator from comment #0)
I'd like to take a screenshot, but Postal 2 likes to take over my desktop and I'm not certain how to rectify this. I can't alt-tab out of Postal 2 to take a screenshot and using Steam's screenshot utility, I only get garbled output.
You could log in via ssh and get a screenshot using a command line utility, or you could take a picture of the screen.
Please attach the /var/log/Xorg.0.log file and the output of dmesg and glxinfo.