Hi!
On 23.02.2017 09:21, Yves-Alexis Perez wrote: > Try to log at the logs? Syslog and stuff from /var/log/lightdm. Also try to > change your greeter (which one do you use?) I just found out that the log-in GUI controls were not shown since they were sent to another monitor that while powered on is showing the signal of another machine, most of the time. To notice, one needs to move the mouse and/or notice (and know the implications of) the absence of the gray bar on the top of the screen. Neither applied to me. Please feel free to close as invalid or not-a-bug. Best Sebastian