I found an issue when using two monitors. It was observed on KDE Plasma 6.6.4 and 6.6.5. To reproduce it, simply keep both monitors connected and let the system enter sleep mode (or force it), or turn the monitors off.
After waking the system and using the display settings shortcut (next to the clock) to disable one of the monitors, the display management system fails. Both monitors lose their configuration, and the only way to restore them is by reconfiguring everything manually.
Has anyone experienced this issue or knows a solution for it? Thank you.
So for example, I have two monitors arranged horizontally. My panel is on the right-hand one.
If I power off the right-hand monitor, Plasma rearranges things so the panel moves to the left.
But then I power on the right-hand one again, and the panel goes back to the right. So I don’t lose anything or have to manually reconfigure - the expected setup gets restored.
It’s probably useful to provide more details of your setup - particularly what GPU, what monitors, and what resolutions you use.
I experienced this issue on another Fedora 44 KDE installation besides my own. I also saw the same thing happen on Kubuntu. Have you tried letting the system turn off both displays or enter sleep mode? When the system wakes up, try disabling or switching between the displays using the menu next to the clock or even the SUPER + P shortcut.
That doesn’t really do anything on my system (desktop with two monitors) - it seems to be more for a laptop where you switch between an internal and external monitor. So maybe the issue is specific to that laptop configuration.
This sounds like it’s not a distro-specific issue but an upstream KDE issue - you could report it on the KDE forum.