I have a weird problem, which I didn't found anything on the internet about.
I installed KDE4.10 (from kubuntu-ppa/backports) a week ago, and it changed the loginscreen. After there was something weird with my sound (doesn't matter anymore) I uninstalled kubuntu-desktop, rebooted and then i just got this (for explenation: last line says
mountall: connection to plymouth disconnected (in german)). After installing kubuntu-desktop again. The problem was gone, but I had again this KDE-like loginscreen.
Later i figured out, that i can change the greeter in
greeter-session=lightdm-gtk-greeter-ubuntu but this brings back the old problem which can be seen in the picture i linked above.
Does anyone know how i can fix this? I would like to have the standard-loginscreen again.