Touchpad stops registering single touch movements after some time

[Jan Baran]

Hello,

touchpad on my Dell XPS 17 (9720) with ubuntu 23 behaves weirdly.
It usually works fine for a few hours and then it stops registering single touch movements, so it cannot be used to move cursor as expected. But clicks and multitouch stuff works (scrolling, ...). If one want to move cursor, two fingers must be used, one static, one moving, which is weird.
Problem occurs randomly.
If notebook is restarted after it occurs, problem is not solved.
If notebook is turned off after the problem occurs, issue disappears.
BIOS and all firmware is up to date, I use dual boot with windows.
I followed touchpad debugging page on askubuntu and managed to get some logs before and after + from evtest.

Thanks !

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: xserver-xorg-input-libinput 1.2.1-1 [modified: usr/share/X11/xorg.conf.d/40-libinput.conf]
ProcVersionSignature: Ubuntu 6.2.0-20.20-generic 6.2.6
Uname: Linux 6.2.0-20-generic x86_64
ApportVersion: 2.26.1-0ubuntu2
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Jun 15 17:14:01 2023
DistUpgraded: Fresh install
DistroCodename: lunar
DistroVariant: ubuntu
InstallationDate: Installed on 2023-05-21 (24 days ago)
InstallationMedia: Ubuntu 23.04 "Lunar Lobster" - Release amd64 (20230418)
MachineType: Dell Inc. XPS 17 9720
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.2.0-20-generic root=UUID=58d64f58-ccff-45f5-8a38-c6805fc27d2a ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-input-libinput
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/22/2023
dmi.bios.release: 1.16
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.16.1
dmi.board.name: 0KNF8J
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.16.1:bd03/22/2023:br1.16:svnDellInc.:pnXPS179720:pvr:rvnDellInc.:rn0KNF8J:rvrA00:cvnDellInc.:ct10:cvr:sku0AFF:
dmi.product.family: XPS
dmi.product.name: XPS 17 9720
dmi.product.sku: 0AFF
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.114-1
version.libgl1-mesa-dri: libgl1-mesa-dri 23.0.2-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 23.0.2-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:21.1.7-1ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.6-2build1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-3
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1