As I've been struggling with this same thing for couple of weeks, I'll provide the info requested.
I have 3 NUC models and 2 of them are affected by this same thing. The one that works is the i3 version NUC5i3RYKH. These have this problem, they will boot maybe 1 time out of 20 tries, reboot tends to hang too: NUC5PPYH and NUC5CPYH, one is Pentium version and the other one is Celeron version. These both share same BIOS code. I didn't have such luck that the old BIOS version 0043 would work, they all behave the same as reported earlier in this post. Information requested: PYBSWCEL.86A.0047.2015.1123.0950 11/23/2015 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1521749 Title: NUC NUC5CPYH Does not boot on Ubuntu 15.10 (linux-image-4.2.0-19) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1521749/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs