Where is the prefilled user name on KDE login screen stored

Question

We are heavily using VirtualBox on our developer workstations. Since we share the images with other developers quite often, I have tried to automate this process as much as possible (cleaning up ap-get cache, removing tmp and log files...). We are using Ubuntu 11.10 with KDE 4.7.4, by the way.

Now I have stumbled over one little annoyance. At the login screen there is a user name prefilled and I could not figure out where this is stored. The problem is, if people get a VirtualBox image and don't realise that the pre-filled user name is not their own and enter their password a couple of time, they lock the said user on our LDAP.

Any idea where is this user name is stored, so I could remove it..?

Answer 1

By default, the login screen (KDM) will preselect the the last logged-in user and I'm not sure where it gets this information. However, you can configure KDM to always preselect the same user in /etc/kde4/kdm/kdmrc:

# Greeter config for all displays
[X-*-Greeter]
...
# Specify, if/which user should be preselected for log in.
# "None" - do not preselect any user
# "Previous" - the user which successfully logged in last time
# "Default" - the user specified in the DefaultUser option
# Default is None
PreselectUser=Default
# The user to preselect if PreselectUser=Default.
# Default is ""
DefaultUser=johndoe
...

Of course, you can set PreselectUser=None if you don't want to select any user.

Answer 2

On OpenSUSE 12.2 it is the /var/lib/kdm/kdmsts

# cat /var/lib/kdm/kdmsts
[PrevUser]
:0=user1
:1=user2
:2=user1