Fedora 18 screen blinks 4 or 5x no GDM after update
 

After the update to kernel 3.7.7 the screen blinks 4 or 5 times and never reaches GDM. Xorg finishes without errors.
I' ve noticed this in the gdm-slave log:

gdm-simple-slave[1489]: WARNING: Failed to give slave programs access to the display. Trying to proceed.
gdm-launch-environment][1504]: pam_unix(gdm-launch-environment:session): session opened for user gdm by (uid=0)
gdm-launch-environment][1504]: pam_unix(gdm-launcQuote:h-environment:session): session closed for user gdm
gdm-simple-slave[1489]: GLib-GObject-CRITICAL: g_object_ref: assertion `object->ref_count > 0' failed
gdm-simple-slave[1489]: GLib-GObject-CRITICAL: g_object_unref: assertion `object->ref_count > 0' failed

and this in the messages;

dbus-daemon[796]: dbus[796]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.4" (uid=0 pid=823 comm="/usr/sbin/gdm-binary ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.56" (uid=0 pid=1618 comm="/usr/libexec/gdm-simple-slave --display-id /org/gn")
Seems a permission problem because of "pam_unix".
authconfig --updateall spits out python errors... ahhh misery

did you by chance install a different version of Python that is in the fedora 18 base or update repo

using a mismatched python can cause errors

Also did you by chance turn on the "rawhide" repo ?
rawhide is the NEXT version of fedora ( right now the ALPHA testing fedora 19 )

if this outputs the listing ( from the root text only login )
then it is not a python error

and please post that list
it should have the fedora base ( std) repo
the update repo
and maybe rpmfusion and fusion update
( the adobe repo is not needed )


Also
It is possible that the fedora 18 repos are a bit out of sync
try the update again
or
if you are using the propitiatory ATI/AMD or NVIDIA drivers ( from the ati or nvidia websites )
then you need to reinstall them after EVERY kernel update .

Thanks John VV, it's definitely not the repo.
It does...
I followed the advice to do a yum distro-sync after upgrading from Fedora 17.
yum update; No Packages marked for Update
But;
Yesterday, after the update, authconfig worked again, so python is OK.
Here the output of it:
http://pastebin.com/kkMb4ZX3
Perhaps you could compare it with yours?
:hattip: linuxghost

After reinstalling almost every part of the problem still couldn't get a "normal" gdm.
So finally a complete new installation of Fedora 18 solved my problem.:D
Funny though that now i also get the lock-slide-screen that i didn't get before!