I recently installed Mandrake 10.1 in my laptop HP ze4600us. When ACPI is enabled my computer gets frozen in a blank screen when booting. I check ACPI is installed but the directory '/proc/acpi' does not exist. I tried to add "acpi=yes" or "acpi=ht" in my 'lilo.conf' and after type "lilo -v" but didn't work out. I don't know what to do, can any one help?