12.04: LightDM freezes while "Logging in..." - maybe due to deactivated login sound [closed]

Solution 1:

i had the same problem, i installed gdm and logins in gdm than lightdm. light dm is a bug-gy. for this at main login crtl+alt+f1 and sudo there and apt-get install gdm and activate it

Solution 2:

Until the official bugfix will be released - which should be soon - there are several ways to fix this problem:

1. Reactivating the login sound with Ubuntu Tweak (worked for me)

2. Installing the official bugfix which is in the "precise-proposed" repository now. https://wiki.ubuntu.com/Testing/EnableProposed

3. Switching to gdm as default display manager as indicated by sam until this problem is fixed.

4. Changing nothing and doing the following when the problem occurs:

   1. Pressing Ctrl + Alt + F1
   2. Logging in as admin user
   3. sudo restart lightdm
   4. Trying to login in lightdm again
   5. Repeating 1., 3. and 4. until the login is successful

(I did a bit of research and I'm now able to answer my question myself. I hope it's no problem)