Comment 0 for bug 1827407

When I start Ubuntu, the touchpad scrolling (using two fingers) works great, but after some time (usually hours) the scrolling becomes very glitchy. The scrolling starts to feel very unresponsive and I have to do the scrolling motion two to three times to scroll the normal amount on a page or document. It feels like only small parts of the actual finger motion converts to scrolling and the rest is cut off. Sometimes (rarely) the scrolling just dies completely. Booting fixes this issue, but often the issue is back very quickly after boot. Unfortunately I have no steps on how to replicate this issue.

This is a new-ish problem that started happening after an update sometime a few months ago and did not appear in the first 18.04 release versions.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xinput 1.6.2-1build1
ProcVersionSignature: Ubuntu 4.15.0-48.51-generic 4.15.18
Uname: Linux 4.15.0-48-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Thu May 2 21:11:18 2019
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 5.2.18, 4.15.0-47-generic, x86_64: installed
 virtualbox, 5.2.18, 4.15.0-48-generic, x86_64: installed
GraphicsCard:
 Intel Corporation HD Graphics 5500 [8086:1616] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo HD Graphics 5500 [17aa:5036]
InstallationDate: Installed on 2019-01-02 (119 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
MachineType: LENOVO 20BWS1S000
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-48-generic root=UUID=cb376add-fb0b-4005-bf43-86651dcf840d ro quiet splash vt.handoff=1
SourcePackage: xinput
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/14/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: JBET71WW (1.35 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20BWS1S000
dmi.board.vendor: LENOVO
dmi.board.version: SDK0K11826 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrJBET71WW(1.35):bd09/14/2018:svnLENOVO:pn20BWS1S000:pvrThinkPadT450s:rvnLENOVO:rn20BWS1S000:rvrSDK0K11826WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T450s
dmi.product.name: 20BWS1S000
dmi.product.version: ThinkPad T450s
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.95-1~18.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.8-0ubuntu0~18.04.2
version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.8-0ubuntu0~18.04.2
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2