I started to experience this bug now after kernel update,
4.15.0-96-generic, 18.04.4, Thinkpad-T470s.

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https://bugs.launchpad.net/bugs/1722478

Title:
  Two-finger scrolling and click-and-drag no longer works after resuming
  from suspend

Status in Linux:
  Confirmed
Status in kmod package in Ubuntu:
  Confirmed
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I own a Thinkpad T440p onto which I have had Debian 9 running without
  hardware issues. I have recently installed Ubuntu 17.10 final beta to
  test it out, but two-finger scrolling does not work at the moment. It
  used to work out-of-the-box from the final beta iso, but a subsequent
  update broke it.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: linux-image-4.13.0-12-generic 4.13.0-12.13 [modified: 
boot/vmlinuz-4.13.0-12-generic]
  ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3
  Uname: Linux 4.13.0-12-generic x86_64
  ApportVersion: 2.20.7-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ghislain  10620 F.... pulseaudio
   /dev/snd/controlC0:  ghislain  10620 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Oct 10 09:20:01 2017
  HibernationDevice: RESUME=UUID=ae4cca1e-80ef-4a1e-87e3-0a860b49492e
  InstallationDate: Installed on 2017-10-05 (4 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170926)
  MachineType: LENOVO 20AN00C1UK
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-12-generic 
root=/dev/mapper/doc1485--lap--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.13.0-12-generic N/A
   linux-backports-modules-4.13.0-12-generic  N/A
   linux-firmware                             1.169
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/31/2016
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GLET83WW (2.37 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20AN00C1UK
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50510 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvrGLET83WW(2.37):bd03/31/2016:svnLENOVO:pn20AN00C1UK:pvrThinkPadT440p:rvnLENOVO:rn20AN00C1UK:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.family: ThinkPad T440p
  dmi.product.name: 20AN00C1UK
  dmi.product.version: ThinkPad T440p
  dmi.sys.vendor: LENOVO

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