Bug 414187

Summary: Language chooser dialog flashes.
Product: [Applications] systemsettings Reporter: Ferenc Lutischan <lutischanf>
Component: kcm_languageAssignee: Eike Hein <hein>
Status: VERIFIED BACKTRACE    
Severity: major CC: bugseforuns, puspam12345678
Priority: NOR    
Version First Reported In: 5.17.2   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Ferenc Lutischan 2019-11-15 17:25:58 UTC 
SUMMARY
Language chooser flashes.

STEPS TO REPRODUCE
1. Open System settings / Regional settings / Language / Add language...
2. Language chooser dialog flashes.
3. If the window is not maximized, the dialog shows normal. (Calculate dialog size is wrong?)

OBSERVED RESULT
Language chooser dialog flashes.

EXPECTED RESULT
Dialog not flashes.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Neon 5.17.2
KDE Frameworks Version: 5.63.0
Qt Version: 5.13.1
Comment 1 Patrick Silva 2019-11-15 20:04:36 UTC 

*** This bug has been marked as a duplicate of bug 411721 ***
Comment 2 Puspam Adak 2020-08-17 10:04:34 UTC 
I have also faced this issue on Plasma 5.18.5. But, in my case, the dialog doesn't stop flickering even when the window is unmaximized.

If I enable the desktop effect "Dialog Parent" (which darkens the parent window when a dialog pops up), then the dialog stops flickering on unmaximizing the window. Looks like an infinite loop issue.