Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: xserver-xorg-input-synaptics (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1834378

Title:
  two-finger scrolling "jumps" unpredictably

Status in xserver-xorg-input-synaptics package in Ubuntu:
  Confirmed

Bug description:
  When attempting 2-finger scrolling, it often happens that the document
  / webpage will scroll down by more than a full screen height at the
  instant I first lay fingers on the touchpad. This happens across
  multiple apps (text editors, web browsers).

  Note: the system (Dell Inspiron 7380) came pre-installed with Windows;
  I erased the HD and installed Xubuntu 18.04 in its place.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: xserver-xorg-input-synaptics 1.9.0-1ubuntu1
  ProcVersionSignature: Ubuntu 4.15.0-52.56-generic 4.15.18
  Uname: Linux 4.15.0-52-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.6
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CurrentDesktop: XFCE
  Date: Wed Jun 26 14:23:35 2019
  DistUpgraded: Fresh install
  DistroCodename: bionic
  DistroVariant: ubuntu
  InstallationDate: Installed on 2018-12-23 (185 days ago)
  InstallationMedia: Xubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
(20180725)
  LightdmDisplayLog: (II) AIGLX: Suspending AIGLX clients for VT switch
  Lsusb:
   Bus 002 Device 002: ID 706b:6b31  
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 0c45:6715 Microdia 
   Bus 001 Device 004: ID 8087:0025 Intel Corp. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. Inspiron 7380
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-52-generic 
root=/dev/mapper/xubuntu--vg-root ro quiet splash vt.handoff=1
  SourcePackage: xserver-xorg-input-synaptics
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/23/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.2.1
  dmi.board.name: 0GW3KR
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.2.1:bd08/23/2018:svnDellInc.:pnInspiron7380:pvr:rvnDellInc.:rn0GW3KR:rvrA00:cvnDellInc.:ct10:cvr:
  dmi.product.family: Inspiron
  dmi.product.name: Inspiron 7380
  dmi.sys.vendor: Dell Inc.
  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

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