Just got testing update today.
I use Surface Pro 6 which use its keyboard to cover the screen. Recently I find that when I open my laptop cover, the screen will blink between the desktop screen and black screen. Only if I do something to change its display(like clicking the right button) will it stop.
System: Host: FIRESTAR Kernel: 5.12.2-arch1-3-surface x86_64 bits: 64 Console: tty pts/1
Distro: Manjaro Linux
Graphics: Device-1: Intel UHD Graphics 620 vendor: Microsoft driver: i915 v: kernel bus-ID: 00:02.0
chip-ID: 8086:5917 class-ID: 0300
Display: server: X.Org 1.20.11 compositor: kwin_x11 driver: loaded: modesetting
alternate: fbdev,intel,vesa display-ID: :0 screens: 1
Screen-1: 0 s-res: 2736x1824 s-dpi: 96 s-size: 723x482mm (28.5x19.0") s-diag: 869mm (34.2")
OpenGL: renderer: Mesa Intel UHD Graphics 620 (KBL GT2) v: 4.6 Mesa 21.1.0
direct render: Yes