Bug 427497

Summary: KWin and Blur effects breaks rounded corners with some themes
Product: [Plasma] kwin Reporter: Ossama Nasser <ossnass>
Component: decorationsAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: normal    
Priority: NOR    
Version: 5.19.5   
Target Milestone: ---   
Platform: Manjaro   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:
Attachments: observed res

Description Ossama Nasser 2020-10-09 18:35:16 UTC
Created attachment 132243 [details]
observed res

SUMMARY
KWin when applying the blur effect, with some themes (tested with whitesur-kde and qogir kde, many more examples are present) prevents full rendering of the shadows of round corners causing a small triangle to appear.

STEPS TO REPRODUCE
1. Select a theme with rounded top window borders
2. Apply the theme with Blur effect enabled


OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
Comment 1 Ossama Nasser 2020-10-09 18:37:51 UTC
Linux: Manjaro with 5.8.11-1 kernel
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.74.0
Qt Version: 5.15.1

We can solve this problem by disabling the Blur effect, but it renders any semi-transparent part of the system completely transparent and useless
Comment 2 Vlad Zahorodnii 2020-10-12 08:09:19 UTC

*** This bug has been marked as a duplicate of bug 395725 ***