I use a login list with faces and the icons and text are tiny in GDM. Is there an easy way to change the resolution of the login screen? I'm currently using 10.04 Lucid.
Gaurav has the right solution for Ubuntu 10.10 (use "Make Default" in System > Preferences > Monitors), however this requires a bit more work in Ubuntu 10.04 LTS. It also means your GDM will have the same resolution as your desktop's.
First find out which resolution your display can take and what its name is. In the following example my laptop display is LVDS-1 and its rated resolution is 1280x800:
Note in the above output the resolution currently used is marked by an asterisk (*). Next you want to test if such resolution works and find the right command to set it up:
In the above command you can change the depth (32 bit) for 24.
Next you want to add such command to the /etc/gdm/Init/Default file before /sbin/initctl ... . The beginning of such file will look like this:
Once you've done this you can logout to see the results. I tested this in a VM environment only but it should work on a standard install ("bare metal").
OK for me the answer was in the xorg.conf file. I don't even know exactly what the pertinent lines are, but previously I didn't have a /etc/X11/xorg.conf file. Because I didn't want to screw anything up I didn't really investigate it. After installing a new video card and switching to the Nvidia binary drivers I used the configuration tool to change the screen resolution. However it was not persistent between logins so I tried the "Write settings to xorg.conf file" button. Next time I logged out the user login menu had the same resolution as all the other users screens. I'm sure this would be a problem if everyone wanted different resolutions but for me that isn't the case.
It can be a isolated problem with the current theme. Which theme you are using now in GDM? Did you check if you have the same problem with others themes?
You also can try to reconfigure your GDM using the commands (You will lose your X11 session doing so) below:
You may need to run the gdmsetup (just works for Ubuntu before 2010):