I use the FC2-x86-64 with KDE desktop.
When PC is busy doing massive download or something, I try to lock the screen. Several times it don't respond at all, didn't lock.
I tried again much latter, it locked, and came out with an unlocking dialog box, asking for password. This is fine.
But behind the unlock dialogbox, all my desktop is still displayed.
I would expect a locked screen to be clear of user's desktop displays, not showing the contents. This should be immediate, and not waiting for screen saver to take place. Nor it should depend on screen saver at all.
When a user have a sensitive session of data on the desktop, and have to walk away, the screen lock should lock down entire console including keyboard & mouse & screen. Otherwise, sensitive data can still be compromized.
Is this a malfunction or is it my PC was too busy that it didn't clear my screen?