fingerprint login in ubuntu 12.04 can't access encrypted home user account

[carlosv]

In Ubuntu 12.04 (and maybe in 11.10 too) if you have an encrypted home directory then logging in from GDM by fingerprint does not work, the home directory cannot be decrypted. For non-encrypted users works fine but for encrypted after the fingerprint is recognized, it tries to start Ubuntu but seems to break and comes back to the lightDM login. With the password works fine.

I have libfprint0: Installed: 1:0.4.0+git20120202-0ppa1~precise2

Normally it should allow to login but it can access and comes back to the ligthDM.