Thomas Diesenreiter, a potential fix for your problem is in the Proposed repository. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed.
If you test this and it addresses the issue, this is likely a duplicate of LP#1773520, so feel free to mark it so. ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1771204 Title: Horizontal lines on Samsung Laptop np900x3f after Update to 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1771204/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs