If lowering the resolution or refresh rate solves it then most likely you need a higher quality HDMI cable.
I say HDMI cable because those usually have the most quality problems, whereas DisplayPort does not. -- 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