What it seems to be impossible to do is to find a laptop with a descent firewire chipset. I looked for ages when making my latest purchase and everything currently had either ricoh or jmicron. The laptop I got has jmicron and it locks up within a few seconds of connecting my firewire soundcard. Since then I have opted for a NI Komplete Audio 6 which has a reputation for "just works" on linux. It is also completely bus powered which means I can record without requiring mains power at all.