Laptop screen doesn't turn off using a wayland-session
When the screen of my Laptop (Thinkpad E480) is supposed to turn off due to inactivity or because the screen has been locked, the screen dims, turns off for a second and then turns back on remaining dimmed. I can see the backlight of the screen and the cursor.
I tried this on a fresh Ubuntu 21.04 installation and Fedora 34 live-system with the kernel versions 5.08, 5.11 and 5.12 with exactly the same result. The screen behaves normally when staring a Xorg-session.