Bug 465171

Summary:	scaling changes mouse acceleration/sensitivity
Product:	[Plasma] kwin	Reporter:	Tom Englund <tomenglund26>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED INTENTIONAL
Severity:	normal	CC:	kde
Priority:	NOR
Version First Reported In:	git master
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Tom Englund 2023-02-02 13:26:28 UTC

mouse sensitivity gets changed with scaling, setting it to 150% i assume it now means im moving 1.5 pixels per same distance moved on touchpad or mouse as if i didnt scale it. it means acceleration profile is changed with its ramp up time etc also feels like its more "unprecise". i guess this is a sideffect of scaling when the idea was simply to enlarge my fonts.

SUMMARY
with scaling set to 150%, mouse sensitivity changed.


STEPS TO REPRODUCE
1. Change the scaling and move mouse around


OBSERVED RESULT
changed sensitivity and acceleration.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.26.90
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8
Kernel Version: 6.1.8-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5800H with Radeon Graphics
Memory: 30,7 GiB of RAM
Graphics Processor: AMD Radeon Graphics
Manufacturer: Acer
Product Name: Nitro AN515-45

Comment 1 David Edmundson 2023-02-02 13:30:43 UTC

>mouse sensitivity gets changed with scaling

Yes. It should move as fast across the screen if you have a 4k monitor at 2x or a regular monitor.

> also feels like its more "unprecise"

it's not.