Comment 27 for bug 334101

I'm guessing that by "the driver" you mean "an ati driver" which was probably the closed source fglrx.

The answer is; It still works just as well, except that Jaunty is using a later release of Xorg, and ATI haven't released a build of their driver that matches; and so it doesn't work on the current Xorg in Jaunty.

THIS driver is new-ish and has always been poor on newer hardware AFAIK, it's just that more people are having to use it sooner than they thought because ATI are taking their time releasing their closed source driver.

Some people are using the old intrepid Xorg server so they can keep using the closed source drivers.