Editei o /boot/grub/menu.lst
2 – e coloque como ver abaixo (acpi=off apic=off noacpi noapic ):
title Debian GNU/Linux, kernel 2.6.18-6-k7 (single-user mode)
root (hd0,0)
kernel /boot/vmlinuz-2.6.18-6-k7 root=/dev/hda1 ro acpi=off apic=off noacpi noapic
initrd /boot/initrd.img-2.6.18-6-k7
savedefault