** Attachment added: "dmesg"
https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1871994/+attachment/5350951/+files/dmesg
** Description changed:
The primary (built-in) display will cause black screen when external 4K
monitor is configured to flipped
Steps to reproduc
** Description changed:
- The primary display is black screen when external 4K monitor is
- configured to flipped
+ The primary (built-in) display will cause black screen when external 4K
+ monitor is configured to flipped
+
+ Steps to reproduce:
+ 1. plug 4K monitor via HDMI
+ 2. open gnome-cont
