So with Plasma 6 and sddm I see a data leak problem, and lengthy delays when waking from sleep or resuming from hibernate on my laptop.
If I press Meta-L I can lock the screen, and enter a password, everything is really snappy.
If I resume from hibernation, the first thing that is presented is the full desktop of the logged in user, even before logging in, I can see all the things open on the desktop before authenticaiton occurs. Can move the mouse pointer around. Cannot click on anything though.
After about 30 seconds, the sddm login will be presented, covering up the screen and I can authenticate then and use the system as normal.
This is also the case if the machine goes to idle timeout, or resumes from sleep.
In all of these cases, activating the system again will leak the current desktop for half a minute or more before the login screen overlays the desktop.
What might this be? I can’t see anything standout in the logs, but I don’t really know what I’m looking for here. Appreciate any ideas.
Can I ask, are you on X11 or Wayland? If X11, it’s been a bug that’s been going on for years, but shouldn’t be present in Wayland. If you are, please take a moment to log it, it makes a difference.
