Choose between GDM and KDM

[Alexandre Laurent]

Hi everybody!

    My girlfriend has been using Ubuntu for a few weeks. She's seen 
Kubuntu work from a LiveCD and she got enthusiastic about it. I advised 
her to install the package "kubuntu-desktop" on her computer, which 
would allow her to try Kubuntu while not touching her Ubuntu installation.

    She did just that. At the prompt, she accepted to have KDM replace 
GDM. After playing around a bit, she's decided she liked Gnome better. 
She was already getting used to Gnome and didn't feel like going through 
the process of learning another desktop manager again.

    She doesn't want to remove KDE quite yet, but she does want to use 
Gnome primarily. The trouble is, when started from KDM, Gnome doesn't 
allow you to turn the computer off anymore. You first have to log out in 
order to switch the computer off from KDM.

    Now, my question is this. How do you tell the system you want to 
revert back to GDM instead of KDM?

    And while I'm at it, how do you choose the start-up/shut-down theme? 
Currently, the start-up process shows the brown Ubuntu progress bar, 
while shut-down shows the blue Kubuntu "regression" bar.

    Pointers are welcome. Thanks in advance for your input.

       Alexandre