Same setup as #2 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2065250/comments/2
The failing monitor is 1080p old NEC MustySync EA231EMi The main monitor is 4K, it has no issues Lowering resolutions to 1600x900 on failing monitor or 1080p on 4k monitor solves the issue Lowering refresh to 50 hz on the failing monitor also solves the issue -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2065250 Title: My external Diplay Flickers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2065250/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs