Happens to me on a NUC i7 DP port..... it happens when monitor goes idle power save mode or when i turn off the monitor.
Linux nuc 4.2.0-16-generic #19-Ubuntu SMP Thu Oct 8 15:35:06 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Distributor ID: Ubuntu Description: Ubuntu 15.10 Release: 15.10 Codename: wily
Happens to me on a NUC i7 DP port..... it happens when monitor goes idle power save mode or when i turn off the monitor.
Linux nuc 4.2.0-16-generic #19-Ubuntu SMP Thu Oct 8 15:35:06 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Distributor ID: Ubuntu
Description: Ubuntu 15.10
Release: 15.10
Codename: wily