I have posted about this problem when I compiled kernel
Problem booting compiled kernel - openSUSE Forums
However, now I did online updates, and now, even my working kernel stopped working after it was updated
I am afraid this is some suse 11.0 / grub general booting problem
My laptop is ASUS PRO 50, Core2, 2 GB ram, ATI X2300
Resume: freshly installed openSUSE 11.0, Online Update -> no more booting
(just xen kernel), not even rescue, noting in the list will boot except xen.