This bug is still present for me with a fresh install of xenial.
I have a dual-monitor setting with DVI and HDMI.
As noted before, the behaviour is erratic, it does not happen every day or after each locked screen.
I am mostly unable to log in (unresponsive log-in screen or black screen) after relatively long periods of inactivity such as when I come back to the office in the morning.
This bug is still present for me with a fresh install of xenial.
I have a dual-monitor setting with DVI and HDMI.
As noted before, the behaviour is erratic, it does not happen every day or after each locked screen.
I am mostly unable to log in (unresponsive log-in screen or black screen) after relatively long periods of inactivity such as when I come back to the office in the morning.