When I turn on my laptop from sleep, I have to input my password twice. Once there is a white rectangular window (reminds me of gnome) and then lighdm unlock screen. When I dissable "Ask for password after sleep", I still get the white window.

System: Ubuntu 16.04 with Unity


Unlock screen asks twice only if AC is not plugged in.

Thank you

  • +1 for Ubuntu 14.04 with Unity. It asks for the password even if AC is plugged in
    – zuba
    Jul 14 '17 at 19:49

After some research I found a solution.

Package gnome-screensaver had to be removed, as it was installed as dependency and caused above bug.

To remove it, simply type in terminal:

sudo apt remove gnome-screensaver

  • Thank you so much. It works for me, but It needed to reboot. Dec 16 '19 at 10:59

Ran into a similar issue since yesterday after a bunch of updates, Ubuntu 16.04 LTS, with the AC plugged in.

Removing the package gnome-screensaver helped, but I had to reboot to make it work. Before the reboot, I didn't get the grey password popup any more after resuming from stand-by, but also not the regular unity login either, so I couldn't log back in at all (also couldn't go to shell via CTRL+ALT+F1).

After a hard (power off) reboot, everything seems to be working again.

Hope this helps!

  • 2
    Thank you, but this answer is already posted Nov 23 '18 at 8:44

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