Stuck up at boot in Intrepid Ibex ?

In Live CD press F6 to get boot options add

acpi=off

AND in hp6515b (maybe others with such unsupported bios) also add

pnpbios=off

After install add to your /boot/grub/menu.lst to the line with kernel

acpi=off

pnpbios=off (only with unsupported bios add this)