Bug 472150

Summary: Broken Scaling under Wayland, only workaround is to use Force Font DPI for proper scaling
Product: [Plasma] kwin Reporter: kodatarule
Component: wayland-genericAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED LATER    
Severity: normal CC: kde
Priority: NOR    
Version First Reported In: 5.27.6   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description kodatarule 2023-07-11 08:44:48 UTC 
SUMMARY
***
Broken scaling + performance issues on NVIDIA
***


STEPS TO REPRODUCE
1.  Change global scale in display and monitor settings to anything above/below 100%


OBSERVED RESULT
Sometimes when using left click+hold and dragging to select multiple files results in degraded performance (most notably visible in dolphin)  and broken scaling as well

EXPECTED RESULT
To just scale fonts + desktop just fine

SOFTWARE/OS VERSIONS
Operating System: EndeavourOS 
KDE Plasma Version: 5.27.6
KDE Frameworks Version: 5.108.0
Qt Version: 5.15.10
Kernel Version: 6.4.2-zen1-1-zen (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5800X3D 8-Core Processor
Memory: 31,2 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 3090/PCIe/SSE2
Comment 1 kodatarule 2023-07-11 08:46:43 UTC 
Apologies, forgot to add that also it's heavily mixed bag - some stuff is heavily blurred and not scaled at all, while other things are crisp.
Comment 2 David Edmundson 2023-07-11 12:22:59 UTC 
This should be better with Qt 6.6 or newer