Bug 515827

Summary: Scrollbar can't handle situations involving two scrollbars
Product: [Plasma] kwin Reporter: Fernando Marcelino Muniz <fernandommuniz>
Component: generalAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED UPSTREAM    
Severity: normal CC: xaver.hugl
Priority: NOR Keywords: usability
Version First Reported In: 6.5.5   
Target Milestone: ---   
Platform: CachyOS   
OS: Linux   
URL: https://bugzilla.mozilla.org/show_bug.cgi?id=2014389#c9
See Also: https://bugs.kde.org/show_bug.cgi?id=515828
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Fernando Marcelino Muniz 2026-02-10 17:07:27 UTC 
STEPS TO REPRODUCE
1. Open a DeviantArt post with a 4K image, open the image, click to zoom; try to use the image's scrollbar.
2. Open a YouTube live, activate Theater Mode; try to use the chat's scrollbar.
3. Open TheVerge news outlet's comment section; try to use the comment section's scrollbar.

OBSERVED RESULT
The page's scrollbar stays right on top of the content's scrollbar; ruining navigation.

EXPECTED RESULT
The scrollbars should be side by side, and perhaps the one on the right should vertically say "Page" and the one on the left should vertically say "Content".

SOFTWARE/OS VERSIONS
Operating System: CachyOS Linux 
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.2
Kernel Version: 6.18.9-2-cachyos (64-bit)
Graphics Platform: Wayland
Processors: 8 × 11th Gen Intel® Core™ i5-11300H @ 3.10GHz
Memory: 9 GB of RAM (8.1 GB usable)
Graphics Processor 1: Intel® Iris® Xe Graphics
Graphics Processor 2: NVIDIA GeForce GTX 1650
Manufacturer: LENOVO
Product Name: 82MG
System Version: IdeaPad Gaming 3 15IHU6

ADDITIONAL INFORMATION
https://bugzilla.mozilla.org/show_bug.cgi?id=2014389#c9
Comment 1 Zamundaaa 2026-02-10 20:40:02 UTC 
KWin doesn't render any scrollbars. Report it to the app / browser in question.