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Black screen on GDM start, Gnome works

When I boot my Fedora 19 (all updates applied, kernel 3.10.10, nvidia drivers; on a Lenovo W530), I can see the nvidia logo flash, but afterwards the screen stays black (also no cursor, just pitch black), and no gdm comes up. I tried lightdm instead of gdm, which works, but I can't use it because it's not able to lock the screen with gnome.

If I change to tty2 when I see the black screen, I can login and start gnome by using startx, and systemctl status gdm tells me that gdm is active/running, But if I try to lock the screen, everything goes black and I can't even switch to another virtual terminal

Xorg log shows no errors and /var/log/messages only shows 6 occurrences of this message:

Sep 2 20:39:37 w530-fedora sysinit[595]: Unable to connect to X server

and the last line is:

Sep 2 20:39:37 w530-fedora dbus-daemon[623]: dbus[623]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.7" (uid=0 pid=693 comm="/usr/sbin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.8" (uid=0 pid=780 comm="/usr/libexec/gdm-simple-slave --display-id /org/gn")

i have already googled a lot, but most people experience errors only after login, not when starting gdm.

Thanks for any help!

Black screen on GDM start, Gnome works

When I boot my Fedora 19 (all updates applied, kernel 3.10.10, nvidia drivers; on a Lenovo W530), I can see the nvidia logo flash, but afterwards the screen stays black (also no cursor, just pitch black), and no gdm comes up. I tried lightdm instead of gdm, which works, but I can't use it because it's not able to lock the screen with gnome.

If I change to tty2 when I see the black screen, I can login and start gnome by using startx, and systemctl status gdm tells me that gdm is active/running, But if I try to lock the screen, everything goes black and I can't even switch to another virtual terminal

Xorg log shows no errors and /var/log/messages only shows 6 occurrences of this message:

Sep 2 20:39:37 w530-fedora sysinit[595]: Unable to connect to X server

and the last line is:

Sep 2 20:39:37 w530-fedora dbus-daemon[623]: dbus[623]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.7" (uid=0 pid=693 comm="/usr/sbin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.8" (uid=0 pid=780 comm="/usr/libexec/gdm-simple-slave --display-id /org/gn")

i have already googled a lot, but most people experience errors only after login, not when starting gdm.

Thanks for any help!

Edit: I was able to fix the problem. Somehow the gdm user account had expired, which apparently prevented gdm from getting an x session. Reactivating the account with chage -E -1 gdm fixed it.