It's the same problem as with ATI drivers, as discussed on OpenSuse forum 2 years ago:
ATI Driver installs have destroyed SUSE/GNOME graphics setup
Uninstalling RPMs doesn't revert changes made during installation and leaves system with:
symlink /var/lib/X11/X
pointing to nonexistent /usr/bin/X.x11-video-nvidiaG03
(it should be reverted to point to /usr/bin/Xorg
)
changed DISPLAYMANAGER_XSERVER
value in /etc/sysconfig/displaymanager
(it should be changed back to Xorg
)
(The link above has more details. But it took me a couple of hours of reading logs, rebooting and googling to find it. Maybe this Q&A will save someone's time).