[tavoc]

Yes, you can do that by either xorg.conf or by manually using xrandr

 I have searched for bugs like mine, and it seems like this is known to certain intel CPU/GPU drivers.
For me it looks like this behaviour: https://bugs.freedesktop.org/show_bug.cgi?id=100267
german link: https://www.thomas-krenn.com/de/wiki/Ubu...aktivieren
Here is also the explanation why everything was ok with Ubuntu 16.04.1 (last time I used it).

is this patch included in Libreelec X86 Kernel? https://git.kernel.org/pub/scm/linux/ker...49d5e5dc43