Touch Pad Cursor Speed Degreases Dramatically at Desired Resolution

[Lonnie Lee Best]

Although I'm able set resolution to 1920x1080, upon doing so, the touchpad on my Logitech K400 Wireless keyboard/touchpad becomes so slow and laggy, that I cannot enjoy the better looking resolution.

I've tried adjusting the touchpad speed to its max setting in GNOME3's settings panel, but this has an almost unnoticeable influence.

When I set resolution to 1440x900, the same touchpad is very fast and responsive.

The bug is that nothing in the touchpad settings addresses this issue: I either have to endure less than optimal resolution, or endure less than optimal touchpad sensitivity.

I'm currently installing this:
sudo apt install kde-plasma-desktop

I'll report back soon as to notify whether or not this allows me to have decent touchpad sensitivity at a 1920x1080 resolution.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-gnome-desktop (not installed)
ProcVersionSignature: Ubuntu 5.4.0-88.99-generic 5.4.140
Uname: Linux 5.4.0-88-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Thu Oct 14 22:20:01 2021
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-gnome-meta
UpgradeStatus: Upgraded to focal on 2021-05-26 (141 days ago)

[Lonnie Lee Best (launchpad-startport)]

After installing this:
sudo apt install kde-plasma-desktop

I'm able to enjoy 1920x1080 resolution with fast and smooth touch-pad responsiveness. Also, I didn't have to adjust any settings; it seems optimal by default.

This confirms to me that this is a bug GNOME3. Again, in GNOME3, even on the fastest touchpad setting, it takes numerous finger lifts to move across the entire screen at a 1920x1080 resolution. Also, each move of the mouse cursor seems to lag slightly. However, at 1440x900 GNOME3's touchpad speed and responsiveness works fine.