Bug 446054

Summary: Zoom effect freezes screen only on Wayland
Product: [Plasma] kwin Reporter: Josep Febrer <jfebrer>
Component: effects-variousAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: normal    
Priority: NOR    
Version First Reported In: git master   
Target Milestone: ---   
Platform: Debian unstable   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Josep Febrer 2021-11-24 23:43:44 UTC 
SUMMARY
***
After building KWin from the latest git master I found that when I activate the zoom effect on Wayland the screen freezes and the cursor disappears. I haven't found a way to restore it.
I have to go to a tty to restart the session. When the freeze happens I discovered that the keyboard is still responding because I can stop a window which is playing music with a keyboard shortcut but even if I exit the session with a keyboard shortcut the screen remains friezed as nothing happened.
Under X11 I can use the zoom effect as usual without any issue.
***


STEPS TO REPRODUCE
1. Turn on the zoom effect on system settings.
2. Use the zoom effect with a keyboard shortcut.

OBSERVED RESULT

The screen freezes completely and I have to go a tty to be able to restart the desktop session.

EXPECTED RESULT

The screen should be zoomed.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Debian GNU/Linux unstable
(available in About System)
KDE Plasma Version: 5.23.80
KDE Frameworks Version: 5.88.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
Comment 1 Josep Febrer 2021-11-29 23:36:25 UTC 
Fixed by Vlad's commit 1f318a2245f9f887a2bf8aa320dc905a012842df.

*** This bug has been marked as a duplicate of bug 445412 ***