I feel your pain, having suffered the same issue just a few seconds ago. Although there's a chance we're seeing the same symptoms with different root causes so please be sure to open your own bug by running:
ubuntu-bug linux Start by testing different display cables/connection types. ** Changed in: mutter (Ubuntu) Status: In Progress => Fix Released -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1929209 Title: [i915] external monitor goes black for several seconds at a time, randomly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1929209/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs