Fabián,
Probably you also need to edit at the bottom of /etc/lightdm/lightdm.conf.
#greeter-session=unity-greeter greeter-session=lightdm-gtk-greeter
If "Pre-released updates" is checked in Software Sources, and you applied updates after installing from my PPA, the binaries from PPA may have been overwritten. I have uploaded an updated source to PPA, and it's currently building.
Fabián,
Probably you also need to edit at the bottom of /etc/lightdm/ lightdm. conf.
#greeter- session= unity-greeter session= lightdm- gtk-greeter
greeter-
If "Pre-released updates" is checked in Software Sources, and you applied updates after installing from my PPA, the binaries from PPA may have been overwritten. I have uploaded an updated source to PPA, and it's currently building.