Hi, I found the solution for the touchpad - it is written on this webpage: 
https://www.bw-pc.uni-freiburg.de/linux.
=> sudo nano / etc / modules
=> Insert the line: i2c_hid
=> Quit "nano" with CTRL + o and CTRL + x
=> reboot
However, the question with the keyboard is still open. Sometimes it does not 
work. The only thing that help is to put the computer in to the sleep mode or 
restart. But it happens very rarely.

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https://bugs.launchpad.net/bugs/1907962

Title:
  The touchpad doesn't work and sometimes keyboard

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Description:  Ubuntu 20.04.1 LTS
  Release:      20.04

  Ubuntu 5.4.0-58.64-generic 5.4.73

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: linux-image-5.4.0-58-generic 5.4.0-58.64
  ProcVersionSignature: Ubuntu 5.4.0-58.64-generic 5.4.73
  Uname: Linux 5.4.0-58-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.13
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  oleksandr   1379 F.... pulseaudio
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Dec 13 14:13:00 2020
  InstallationDate: Installed on 2020-12-11 (1 days ago)
  InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  MachineType: FUJITSU CLIENT COMPUTING LIMITED LIFEBOOK U7410
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-58-generic 
root=UUID=be9b4d42-06a6-492c-a49c-b1f88b6c58c6 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-5.4.0-58-generic N/A
   linux-backports-modules-5.4.0-58-generic  N/A
   linux-firmware                            1.187.6
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/23/2020
  dmi.bios.vendor: FUJITSU CLIENT COMPUTING LIMITED
  dmi.bios.version: Version 2.12
  dmi.board.name: FJNB2D4
  dmi.board.vendor: FUJITSU CLIENT COMPUTING LIMITED
  dmi.board.version: A2
  dmi.chassis.type: 10
  dmi.chassis.vendor: FUJITSU CLIENT COMPUTING LIMITED
  dmi.chassis.version: LIFEBOOK U7410
  dmi.modalias: 
dmi:bvnFUJITSUCLIENTCOMPUTINGLIMITED:bvrVersion2.12:bd06/23/2020:svnFUJITSUCLIENTCOMPUTINGLIMITED:pnLIFEBOOKU7410:pvr10601115935:rvnFUJITSUCLIENTCOMPUTINGLIMITED:rnFJNB2D4:rvrA2:cvnFUJITSUCLIENTCOMPUTINGLIMITED:ct10:cvrLIFEBOOKU7410:
  dmi.product.family: LIFEBOOK-FTS
  dmi.product.name: LIFEBOOK U7410
  dmi.product.sku: SK00
  dmi.product.version: 10601115935
  dmi.sys.vendor: FUJITSU CLIENT COMPUTING LIMITED

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