Bug 470083

Summary:	[Regression] Mouse pointer speed is reduced in latest kde/kwin version
Product:	[Plasma] kwin	Reporter:	zvova7890
Component:	input	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	nate
Priority:	NOR
Version First Reported In:	5.27.5
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description zvova7890 2023-05-21 12:48:58 UTC

SUMMARY
Mouse pointer in 5.27.5 is much more slower than before on default settings. To get it around the same speed as before I tweak pointer speed slider in settings almost to maximum.
X11 session. I haven't tested on wayland.

STEPS TO REPRODUCE
1. Update to 5.27.5
2. Mouse pointer is slower than before with default settings

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.106.0
Qt Version: 5.15.9
Kernel Version: 6.2.11-zen1-1-zen-dirty (64-bit)
Graphics Platform: X11
Processors: 16 × 11th Gen Intel® Core™ i7-11700 @ 2.50GHz
Memory: 31.2 GiB of RAM
Graphics Processor: AMD Radeon RX 6800 XT
Manufacturer: ASUS

ADDITIONAL INFORMATION
libinput: 1.23.0-1

Comment 1 zvova7890 2023-05-21 18:50:09 UTC

I'm just realize that the acceleration profile has changed to the "flat" instead "adaptive"? I switch it back to the adaptive and behavior restored as previous. But, why "flat" is so slow by default...?

Comment 2 Nate Graham 2023-05-22 20:08:20 UTC

This is an upstream libinput issue.