Is it the driver issue? The rumor mill, and I emphasize RUMOR, is that the power supply provided with the 8100 didn't have enough juice to power both the 8100 playing a game and doing something else. I.e. they were having lots of issues with them.
If it were a straight driver issue, the likelihood would be that Dell would pull all the ATI products from their systems. They haven't. The default card for the 8100 is the Radeon 5450. Its a decent card if you intend to surf but lacks the horsepower to do much in terms of gaming.