I installed Ubuntu 12.04 to a pair of Inwin BL Series machines with AMD A4 series CPUs and an Asus motherboard (Asus F1A55-M/CSM, Micro ATX, Socket FM-1).
Install was smooth, but when the machine boots the keyboard does not work at the grub menu, and when it boots the screen goes blank or displays garbage.
I can blindly login and reboot the machine so its obviously running, but video is totally messed up.
Control-Alt-F1/2 does not give me a text console.
I have booted the CD to rescue mode and set grub to text mode, which works... but as soon as the kernel loads I see it change the font and then the screen again goes blank. The keyboard (USB) does not work until the system is booted so I can't interrupt grub to do anything there.
I assume Ubuntu is setting some graphics or text mode that this hardware does not like.