The gdm user needs to be member of the new audio group created by setup in bug 253243. It is necessary for gdm to access the audio devices for accessible login.
devack for 5.4
I've changed the usermod line in %pre to /usr/sbin/usermod -d /var/gdm -s /sbin/nologin -a -G audio gdm >/dev/null 2>&1 and added a Prereq: setup >= 2.5.58-4.el5 Building now in gdm-2.16.0-50.el5. Marking MODIFIED for QA.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2009-1364.html