Frank Winklmeier, thank you for reporting this and helping make Ubuntu
better.

Could you please run the following command once from a terminal by ensuring you 
have the package xdiagnose installed, and that you click the Yes button for 
attaching additional debugging information:
apport-collect 1773581

** Changed in: linux-hwe (Ubuntu)
   Importance: Undecided => Low

** Changed in: linux-hwe (Ubuntu)
       Status: New => Incomplete

** Package changed: linux-hwe (Ubuntu) => linux (Ubuntu)

** Tags added: needs-bisect regression-update

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https://bugs.launchpad.net/bugs/1773581

Title:
  Horizontal lines on Samsung Laptop np900x3g after update to 4.13.0-43

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  After updating my Ubuntu 16.04 kernel from 4.13.0-41 to 4.13.0-43, I
  am seeing horizontal lines on the display. Rebooting into -41 makes
  them disappear. This is most likely the same problem as seen in 18.04
  by another user:
  https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1771204 (also see
  the attached photo there)

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.13.0-43-generic 4.13.0-43.48~16.04.1
  ProcVersionSignature: Ubuntu 4.13.0-43.48~16.04.1-generic 4.13.16
  Uname: Linux 4.13.0-43-generic x86_64
  NonfreeKernelModules: openafs
  ApportVersion: 2.20.1-0ubuntu2.17
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sat May 26 22:56:48 2018
  InstallationDate: Installed on 2014-05-19 (1468 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  SourcePackage: linux-hwe
  UpgradeStatus: No upgrade log present (probably fresh install)

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