On Thu, 21 Jul 2011 16:17:10 -0400 fred smith fredex@fcshome.stoneham.ma.us wrote:
In later Fedora releases, GDM has become less and less functional: configurability has been removed, more so as releases occur. From my (known to be flaky) memory, that includes the ability to turn off the silly list that exposes usernames right on the login screen, the ability to assign your own wallpaper to the login screen, among other things.
There is a gconf setting to turn off the list of users. I've haven't tried it under CentOS 6, but it works under Fedora 14. I don't know how to fix the wallpaper except by changing the picture behind RPM's back. Or, up until F14, I was using a recompiled version of the CentOS 5 gdm rpm---that might work for C6.
Fortunately, the C6 wallpaper is good enough that I don't feel compelled to tweak it.
In some releases you can hack your way around whatever the missing feature is that you're missing by using gconf-editor, in others you can't.
The user list preference was broken for all of Fedora 13. Blech.
There is a long open gnome bus to restore the gdm setting tool that went away around 2.22. The chances of having it back for gnome 2 are vanishingly small. I'm not holding my breath for the gnome 3 version either.
So, my guess is that RHEL/Centos 6 has inherited the later Gnome "features" that have removed the feature you want.
It's a sad day when Mac OS X is easier to customize than a Linux system.
Jim