To make it more compatible with 'exotic' (or just old) hardware. Last time I looked it used the following boot 'cheat' codes - xforcevesa, nomodeset, b43-blacklist=yes, noapic, noacpi, nosplash, irqpoll.
They are easy enough to google if you want to find out about them.
Fujitsu Lifebook AH532 Laptop. Intel i5 processor, 6Gb ram, Intel HD3000 graphics, Intel Audio/wifi. Realtek RTL8111/8168B Ethernet.Ubuntu12.10 (Unity), Mint14 (Cinnamon), Manjaro (Xfce).