Comment # 6 on bug 105046 from Michael Zapf

Created attachment 137386 [details]
dmesg output after turning the monitor back on (2nd system)

This is another dmesg output, created on my office PC with a UHD display,
connected by DisplayPort.

The turn-off event occurs after time [2643.173460]. Turn-on occurs some seconds
later.

System was updated the same day in the morning (openSUSE Tumbleweed rolling
release, 4.15.2-1).