I am seeing a similar problem with NUC5I7RYH. Both monitors look find at boot-up but one goes blank one you get to the login prompt for X Windows. No flickering. Also on 15.10.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1509596 Title: Second monitor blanks at login prompt To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1509596/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs