[opensuse-factory] Primary display freezes when external monitor is plugged

I'm not sure if this issue was caused by this (20170618) or the previous snapshot, but after tomorrow upgrade (I previously upgraded at Friday), I have problem with external monitor. I have VGA compatible controller: Intel Corporation HD Graphics 520 (rev 07) and fully upgraded TW with KDE. If I plug external monitor (HDMI if it matters), the Plasma freezes. Restart of the Plasma doesn't help. It is not possible to click on anything, nothing. Interestingly, unplugging the monitor defreezes everything and the desktop is fully usable again. As a workaround, the monitor must be plugged before turning on of the computer. Then everything works as usually. Anyone else experiencing this? -- Vojtěch Zeisek https://trapa.cz/