Please first verify if the problem you are having is not something that still is on the 'todo' list and that you are using the latest driver. If it's not on the list and you're using the latest driver, please checkout the Haiku site for open tickets: someone might already be working on the problem you are having.
If you want to report a problem (preferably to Haiku directly) make sure you describe the problem as precise as you can. Every extra bit of info might help find out what's wrong..
(Page last updated on April 11, 2016)