Bug 423880

Summary: Parts of open windows readable when locking screen while 'Show desktop' is active
Product: [Plasma] kwin Reporter: Derek Christ <christ.derek>
Component: compositingAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED FIXED    
Severity: normal CC: nate, wengxt
Priority: NOR    
Version First Reported In: 5.19.2   
Target Milestone: ---   
Platform: Manjaro   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Taken in the lockscreen

Description Derek Christ 2020-07-04 19:00:05 UTC
Created attachment 129900 [details]
Taken in the lockscreen

When you press Ctrl+D ('Show desktop') all open windows will move to the four corners of the screen and half opaque, so that the user can see what's on the desktop.
Locking the screen in this state does not cover up this effect, resulting in readable parts of open windows although the screen is locked.

STEPS TO REPRODUCE
1. Open at least one window.
2. Press Ctrl+D to show the desktop.
3. Press Ctrl+L to lock the screen.

OBSERVED RESULT
Lockscreen does not cover the open windows.

EXPECTED RESULT
No windows, just lockscreen.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Manjaro KDE
KDE Plasma Version: 5.19.2
KDE Frameworks Version: 5.71.0
Qt Version: 5.15.0

ADDITIONAL INFORMATION
Screenshots to illustrate what I mean.
Comment 1 Nate Graham 2020-07-07 19:36:05 UTC
I recall that this is a very-recently-fixed KWin bug but I can't find the one to dupe it to.
Comment 2 Patrick Silva 2021-06-09 13:47:27 UTC
*** Bug 423525 has been marked as a duplicate of this bug. ***