Observing same issue on Ubuntu 16.04 (after upgrading from 14.04 where same problem was appearing).
I consider that this effect is also there if you lock the screen manually. Same workaround works: - (lock screen manually; re-login says "wrong password" - try to login as another user with wrong password - after error, switch back to your user - now login works ** Changed in: gnome-screensaver (Ubuntu) Status: Invalid => New -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-screensaver in Ubuntu. https://bugs.launchpad.net/bugs/353356 Title: Gnome screensaver lock always reports "incorrect password" Status in gnome-screensaver package in Ubuntu: New Bug description: Binary package hint: gnome-screensaver When inactive, the screensaver locks the workstation. When logging back in, I enter my password. This always returns "incorrect password". Workaround: hit "Switch User" log in as that same user with the denied password, revealing the session that was logged out of. I changed the password: "sudo passwd". No change in behavior. The question: where is it drawing the password from if not from the same place that the regular login derives it? And how can I fix this admittedly small but annoying problem? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/353356/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp