Bug 514792

Summary: Gap under title bar
Product: [Plasma] kwin Reporter: Eugene <eugene.beetle>
Component: decorationsAssignee: KWin default assignee <kwin-bugs-null>
Status: CONFIRMED ---    
Severity: normal CC: bizyaev, kde
Priority: NOR    
Version First Reported In: 6.5.5   
Target Milestone: ---   
Platform: EndeavourOS   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Gap under title bar

Description Eugene 2026-01-18 13:34:29 UTC
Created attachment 188645 [details]
Gap under title bar

SUMMARY
1 pixel gap under title bar while Minimize/unminimize or open/close qt window of for example Settings (should be not maximized)

STEPS TO REPRODUCE
1. Turn on round bottom corners of widows with no borders
2. Set Now window borders
3. Minimize/unminimize or open/close qt window of for example Settings (should be not maximized)

OBSERVED RESULT
No gap under title bar

EXPECTED RESULT
1 pixel gap under title bar while mentioned operations

SOFTWARE/OS VERSIONS
Operating System: EndeavourOS 
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.1
Kernel Version: 6.18.5-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5800H with Radeon Graphics
Memory: 32 GiB of RAM (30,7 GiB usable)
Graphics Processor: AMD Radeon Graphics
Manufacturer: ASUSTeK COMPUTER INC.
Product Name: MINIPC PN52
Comment 1 Eugene 2026-01-18 13:43:45 UTC
Little typo:
Step 2 to reproduse: "Set No window borders"
Comment 2 David Redondo 2026-01-19 10:58:39 UTC
Round corners seem to make the difference indeed.