[SOLVED] How to change gnome display setting

[shariefbe]

hello,
i was using GDE in my ubuntu system. But yesterday i did some thing so my ubuntu system has changed as debian. My login screen changed and i cant access "system->administration->Login window"
when i do this i am getting this error message
"GDM (GNOME Display Manager) is not running.
You might be using a different display manager, such as KDM (KDE Display Manager), CDE login (dtlogin), or xdm. If you wish to use this feature, then your system will need to be configured to use GDM instead."
Please help me. How to come back to my normal original ubuntu with GNOME.

[amenditman]

I did something just like this two years ago. I'm kinda vague as to what I did to fix it.

But, here's my best guess.

At the login screen there is a button that will say something like 'session' or 'select session'. When you click it you can choose different desktop session, like gdm. There is a config file where you can set the default, but someone else will need to tell you where that is as I do not use Gnome and can't remember anyways.

[devils casper]

Execute this in Terminal :

sudo dpkg-reconfigure gdm

[shariefbe]

Thank you very much. I got it. devils casper solved my problem