Unable to reboot for Ubuntu 8.04 (x86) - Hardy Heron in x86_64 systems

Hi guys,

Do you encounter problem that unable to reboot after your Ubuntu 8.04 (x86) installed in hardware systems that support (x86_64) ?
Below is the minor used to tweak and resolve this problem.

# cd /boot/grub/
# sudo vim menu.lst

add reboot=b end of the line kernel

Example:
kernel /boot/vmlinuz-2.6.24-xx-generic root=UUID-xxxxxxxx-54xx-4xxx-bxxx-1xxxxxxx ro quiet splash reboot=b

Save menu.lst after make changes, reboot system to make sure it works.