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 Touch seeded packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1509596 Title: Second monitor blanks at login prompt Status in lightdm package in Ubuntu: Confirmed Bug description: The system is an Intel NUC D34010WYK with an i3 Hasell processor. Monitor 1 is connected via micro HDMI Monitor 2 is connected via mini DisplayPort At boot BIOS, Grub, systemd, all get mirrored on both screens as expected. However, once the login prompt hits Monitor 2 (DisplayPort) goes blank. It flickers periodically though. When it does flicker on I can see the desktop, any windows that got moved to that monitor and the clock is up to date. The two monitors are exactly the same model, Samsung SyncMaster 204B. I have tried swapping monitors and the issue seems to persist on the mini DisplayPort connection only. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: lightdm 1.16.4-0ubuntu1 Uname: Linux 4.3.0-994-generic x86_64 ApportVersion: 2.19.1-0ubuntu3 Architecture: amd64 CurrentDesktop: Unity Date: Fri Oct 23 20:18:09 2015 InstallationDate: Installed on 2015-10-12 (12 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) SourcePackage: lightdm UpgradeStatus: Upgraded to wily on 2015-10-24 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1509596/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
