https://bugs.freedesktop.org/show_bug.cgi?id=108575
--- Comment #1 from Przemek soprwa@gmail.com --- Created attachment 142606 --> https://bugs.freedesktop.org/attachment.cgi?id=142606&action=edit picture of the screen after resume
With latest (yesterday's) amd-staging-drm-next repo pull situation gets worse. After fresh boot and when drm amdgpu fb gets initialized laptop internal screen gets off and picture appears on external monitor connected to hdmi output.
After sddm login, when plasma desktop fires up picture appears on eDP screen and both (hdmi and internal) are working properly until suspending (s3).
After resume from suspend there is no picture on hdmi monitor, brightess level is reset to 0, on eDP picture is shuttered and full of glitches as you can see on attached photo (it does no matter if it is xorg or tty, both have those glitches). Thanks, Przemek.