I really don't know what does it mean. I have ASUS 6000 series enttertainment nb and when I try to boot with any usb device plugged in, including usb mouse, knoppix stucks after "ACPI interpreter enabled" or another message with ACPI. I can leave it booting as long as I want but problem still remains. Please help, I don't want to eject my mouse any time before booting and plug it in after booted. I can show you my system log, but I don't know whether it helps.