https://bugs.freedesktop.org/show_bug.cgi?id=98146
--- Comment #7 from Darek Deoniziak darekdeoniziak@gmail.com --- Big thanks for help, seems like closing or minimizing fullscreen program doesn't freeze screen anymore (it was biggest issue for me).
I've added 2 files to xorg.conf.d: 20-radeon.conf (this one solved the freezing issue): Section "Device" Identifier "Radeon" Driver "radeon" Option "SwapBufferWait" "0" Option "DRI3" "3" EndSection
and 20-intel.conf decided to stick with intel driver: Section "Device" Identifier "Intel Graphics" Driver "intel" Option "DRI" "3" EndSection
Actually I can't tell if intel is using DRI3, the output from xorg logs is the same. I will also try modesetting driver to see if it does anything.