Comment # 5 on bug 1085048 from Petr Licman

Thanks for quick reply and analysis. I tried kernel 4.16-rc5 from "Kernel of
the day" and everything regarding this issue is different. Laptop screen is not
detected at all, even lid is open, nothing happens. All 3 external displays are
ON and working, but the VGA connected display is duplicate of DVI1 display, but
with max resolution 800x600 (not possible to set higher resolution). 

DVI1 = 1920x1080
DVI2 = 1680x1050 (desktop extended over those DVI1 and DVI2 displays - OK)
VGA = 800x600 (max available, but it is full HD 1920x1080 display), and main
problem - it is duplicating/mirroring image of DVI1

Also quite lot of artefacts (interpolated lines, glitches) are shown during
startup (login screen of KDE), when desktop is shown artefacts are gone, when
power off/ restart window is shown (restart, shutdown, logoff), again it is not
readable, full of artefacts.

New kernel solves the issue with disabled external display but brings a lot of
another issues. 

Do you have any suggestion please?
Could new logs help here?
I guess there is nothing that can be done from your side, it seems to be kernel
issue.