Comment # 8 on bug 1185267 from Lukas Straub

Another workaround is to enable DRI3. So in my case with a intel GPU, I created
a file "/etc/X11/xorg.conf.d/20-intel.conf" with the following content:
Section "Device"
  Identifier "Intel Graphics"
  Driver "intel"
  Option "DRI" "3"
EndSection