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 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1773581/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp