[gdm-list] second greeter appears on open session

[Xavier Toth <txtoth gmail com>]

We are running FC10 and gdm 2.24.1. We configure thin clients which
start X with the -query parameter to a server with gdm configured to
use xdmcp. On ocassion just after logging in on a thin client another
greeter will popup on your desktop. After this occurs the only
recovery mechanism is to reboot the thin client. Shouldn't gdm
recognize that a user is already logged on the display? Could there be
a timing issue between the greeter and session worker? Are there any
gdm configuration options that might help with this issue?

Ted