From your report, it's not clear if you let the installation complete. If you did, you're seeing this slowdown on every boot, can you boot with the parameter "3" and see if the boot progresses any more quickly? It will disable booting into graphical mode, so we can tell if it's choking in graphics or if there is something going on in the background causing graphics to perform slowly. If it boots quickly, reboot without any additional parameters and drop to a command
https://bugzilla.novell.com/show_bug.cgi?id=299630#c1
Jeff Mahoney