Bug 500618

Summary: rendering bug in system monitor on a particular window size
Product: [Frameworks and Libraries] frameworks-qqc2-desktop-style Reporter: vovanblhc
Component: generalAssignee: kdelibs bugs <kdelibs-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: normal CC: ahiemstra, cwo.kde, john.kizer, kde, nate, noahadvs, notmart, plasma-bugs-null
Priority: NOR    
Version First Reported In: 6.12.0   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:
Attachments: bug demonstration

Description vovanblhc 2025-02-23 11:44:45 UTC
Created attachment 178768 [details]
bug demonstration

SUMMARY
When resized to some size, system monitor's Applications tab becomes flickery and poorly rendered

STEPS TO REPRODUCE
1. Open system monitor and slowly resize it to about the size when the scrollbars should disappear
2. Now the Applications tab looks bugged

OBSERVED RESULT
the Applications tab is changing it's size every frame and/or the text is rendered in lower resolution

EXPECTED RESULT
everything renders as intended

SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.3.1
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
Comment 1 Nate Graham 2025-02-24 16:18:20 UTC
Usually when this happens, it's a loop as the geometry updates in response to the scrollbar appearaing and disappearing. But I can't reproduce it on current git master.
Comment 2 Arjen Hiemstra 2025-03-17 17:12:26 UTC
It looks like a binding loop, where if you hit the sizes just right it will continuously update to account for scrollbars - then realise the scrollbars aren't needed and the entire cycle starts again.

Fixing this will need to be done in qqc2-desktop-style however, as system monitor just uses a ScrollView here. So moving this there.
Comment 3 cwo 2025-06-13 09:54:46 UTC
I tried reproducing this for a while recently, and couldn't get it to happen.
Comment 4 John Kizer 2025-06-22 17:23:22 UTC
Hi - I can't reproduce this on Fedora KDE 42 device running git master Plasma, NVIDIA graphics.

For the report here, could you please let us know what display scaling level you're using, and what type of graphics processor you're using?

Thanks!
Comment 5 Bug Janitor Service 2025-07-07 03:47:39 UTC
๐Ÿ›๐Ÿงน โš ๏ธ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

Thank you for helping us make KDE software even better for everyone!
Comment 6 Bug Janitor Service 2025-07-22 03:47:10 UTC
๐Ÿ›๐Ÿงน This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.