I checked the latest mainline kernel and the problem with the horizontal lines is still present there:
Linux winki 4.17.2-041702-generic #201806160433 SMP Sat Jun 16 08:35:37 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux I am not familiar with your other instructions. Which kernels exactly should I test next? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1773581 Title: [Samsung NP900X3G-S01US] Horizontal lines after update to 4.13.0-43 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1773581/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs