Well, can I suggest something...(I faced the same problem and it worked for me

)...
1) Boot into SuSE
2) Press CTRL+ALT+F1
3) Login as root
-->Then type the following commands...(without quotation marks)
"grub"
"find /boot/grub/stage1
-->You will find two entries. Then type the following command (replacing your partition no. where Ubuntu is installed)
"root (hd0,5)"
"setup (hd0,5)"
"quit"
Now reboot...
This might solve your problem.