I too have this problem and it seems to me like it could be because of cable bad quality. I had some cheap HDMI cable and I also get blank screen now and then and it comes right back in 2 seconds. But when I changed the cable it never happened again.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1574617 Title: External monitor keeps going blank To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1574617/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs