I have a fairly new HP laptop that has ATI graphics, the open source drivers work to some degree but every now and then I get 9 garbled images of the login screen... When I used Jockey to install the proprietary drivers I got some error message. (Sorry, I don't remember what the error was.) At any rate, I re-booted the laptop and it was still using the open source drivers.
I went back into Jockey and tried to install the proprietary drivers again and got the same error message. I re-booted again but this time I was using the proprietary drivers! I looked in Jockey and it showed no drivers were activated. The drivers were in fact activated though and working.
This might not work for everyone and make certain that your graphics card is supported because you are likely to break your install if your card is not supported. Yes, there have been numerous reports of breakage so keep that in mind. This solved the issues on my HP DV6 laptop. The laptop boots up much faster and the strange issue with seeing 9 garbled login screens is gone.
Edit: Make sure you choose the recommender driver, (the first one listed) as I understand it the other driver does not exist.
Edit 2: This is a try at your own risk solution. Feedback on your results would be welcome.