You have been subscribed to a public bug:
Ubuntu 11.10
I have 4 users defined.
One of the users has the admin privileges (able to sudo) and the rest are
regular users.
When logging in from a regular user, I am able to switch to a different user.
When logging in from the admin user, after clicking the "switch user", the
screen goes black (as if in screen saver) and then when I move the mouse, the
screen returns to a "lock screen" screen (where I need to put the password for
the admin user). If I try then to press the "switch user" button, the same
things happens.
After entering the password, I see a pop up window on the desktop:
"Failed to unlock: The name org.gnome.DisplayManager was not provided by any
.service files"
The only way to login as a different user is first log out as the admin,
then login as a different user.
I tried the following:
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get --reinstall install ubuntu-desktop
but the problem persists.
Please let me know what other data you require and I'll attach it.
Here are some more details:
hagai@BRUCE:~$ lsb_release -rd
Description: Ubuntu 11.10
Release: 11.10
Hagai
** Affects: lightdm (Ubuntu)
Importance: Undecided
Status: New
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cannot switch user from admin user
https://bugs.launchpad.net/bugs/941287
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