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Old 11-11-2009, 07:42 PM   #1
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Registered: Nov 2009
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Question Ubuntu 9.1 login problem - error communicating with authentication system

I can no longer login into my Ubuntu system after adding a 2nd user. I had automatic login setup and I unchecked the setting to logon as the 2nd user. From there on, I always get this message at the login screen "error communicating with authentication system" no matter which user i choose.

Some thread I found suggest to undo the keypairing line in the /etc/pam.d file but I don't know how to get a terminal directly from boot. I installed Ubuntu as an application from my Vista (dual boot).

Please help.
Old 11-11-2009, 08:58 PM   #2
Registered: Mar 2008
Location: Ohio, USA
Distribution: Mint, Fedora
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When you get to the login screen press Ctrl+Alt+F1 That will give you a command terminal where you can try to login. Good luck
Old 11-11-2009, 09:00 PM   #3
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I fixed the problem, thank you!

1. Hitting <CTRL><ALT><F1> at the login screen got me out of the Xwindows to a text terminal.

2. edit the file /etc/pam.d/gdm to remove/uncomment the line
@include common-pamkeyring

Last edited by thinh; 11-11-2009 at 09:11 PM. Reason: F1 key correction


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