Just got it again, this time immediately after a screen lock. As usual, had to jump to a terminal, lightdm restart, and blow away my session.
No login failures counted in /var/log/faillog (faillog -u myuser shows 0). That leads me to think it's not even communicating with PAM in this state.... I'll give the screensaver idea a try, at least. I think killing it off from a root shell on another TTY would be less destructive than having to wipe out my session :) I can tell you that when it does get in this state, absolutely nothing will allow my user account to unlock the screen - so again, is there any kind of debug logging, tracing, etc I could enable? -- You received this bug notification because you are a member of DX Packages, which is subscribed to unity in Ubuntu. Matching subscriptions: dx-packages https://bugs.launchpad.net/bugs/1499354 Title: Invalid password after long uptime Status in Unity: Incomplete Status in unity package in Ubuntu: Incomplete Status in unity-greeter package in Ubuntu: Invalid Bug description: After a 15.04 system has been running for a long time (more than 2-3 days), and the system has locked the screen automatically during inactivity, attempting to unlock the screen will result in an "invalid password" message at the lock screen, despite using the correct password. The only fix I've found is to jump to a TTY, log in there (which works), and do a "sudo service lightdm restart". I've made no changes to my PAM configuration, nor do I have any packages installed which modify it. Only other thing I've noticed is that normally, my screens go to sleep after the display is locked. Every time this problem presents itself, the displays have awoken at some point overnight. No obvious errors in auth.log, xorg.log, or lightdm.log. Using the proprietary NVIDIA drivers. Unity Installed: 7.3.2+15.04.20150420-0ubuntu To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1499354/+subscriptions -- Mailing list: https://launchpad.net/~dx-packages Post to : dx-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~dx-packages More help : https://help.launchpad.net/ListHelp