Ubuntu – Ubuntu 12.04 32bit cant login

I have tried almost every comment in this subject.
my .xsession-errors file says:

openConnection: connect: No such file or directory
cannot connect to brltty at :0

and that is all. I can login as a guest but not with my account.

After some days with this issue and many SO threads read, I found that this seems to be an Ubuntu open Bug (Status 'Incomplete' as of July 2015).

The quick solution seems to be to rename the file that stores dconf settings:

$ mv ~/.config/dconf/user{,.old}