Comment # 2 on bug 1224073 from Linh Tran

Hi,
I has just found the situation that made this problem. The following steps are
what I had:
1. System hang when use HDMI with Plasma6 and Wayland, I change to X11 -> work
2. After few times update include kernel update -> work 
3. Sytem update some additional  packages -> not work 
4. System update kernel and some packages -> work 

After step 2 and step 4 happen many times, I found that The Gnome Application
Platform package which is required by ProtonVPN (installation from flatpak)
update -> system not work.
So that I have remove ProtonVPN and required Gnome Runtime Application ->
system work.
I think may be Gnome Runtime in KDE cause the problem.