Description of problem: I run X on two different VTs on my system so that I can use different screen resolutions. When I login on the second screen (after previously logging in on the first screen), a dialog message pops up warning that I have already logged in and asking me to confirm that I really want to login again. First, this is a change from Redhat 9 and earlier releases. Second, what's wrong with logging in twice on two different screens?
I discovered that this can be disabled by editing etc/X11/gdm/gdm.conf and changing #DoubleLoginWarning=true to DoubleLoginWarning=false (The commented out value is used by convention to show the system default.)