You can’t start running games, and you have a ATI video card ?
Run “glxgears”, if it crashes, then create this file (ex ati-dri2.conf) inside /etc/X11/xorg.conf.d/
Section "Device" Option "DRI3" "False" Identifier "Card0" Driver "radeon" # BusID "PCI:2:0:0" EndSection
Fix running games with some ATI video cards