The latest fglrx drivers from ati work fine. Follow the instructions here (http://wiki.cchtml.com/index.php/Ubu...allation_Guide) if you want to install the latest, otherwise install the ones from the 'restricted driver list'.
After you install, you may notice upon reboot that your screen goes completely blank. Boot into rescue mode, drop to a root shell and run
and reboot. This should fix the blank screen issue.
I still have an issue where I can't get the laptop to auto poweroff, I think it might be due to disabling the acpi stuff, but at least the fglrx drivers work now :0
The opensource ati drivers do not support the V5725 FireGL card for 3d, so fglrx is your only option to utilize the card.