Comment 17 for bug 593380

Mesa 7.9 that is required seems to have been postponed to Natty Narwhal (11.04).

For those who want to try out the Maverick Netbook Edition (UNE) and are stuck with an ATI board that does cause a white screen there may be a workaround by installing the xorg-edgers for Maverick, of course on your own risk.

The the xorg-edgers PPA for Maverick is
https://launchpad.net/~xorg-edgers/+archive/ppa

Furthermore you probably have to add the following line into your ~/.profile
export CLUTTER_VBLANK=none

This works for me with an ATI (r300/r350 chipset) board.

In case it doesn't work you can remove xorg-edgers again with
sudo ppa-purge xorg-edgers