RE: Inpiron 15R 5537 - Bad game performance or unability to Sleep/Hibernate?
I am having exactly the same problem with my Inspiron 17R with an AMD 8870M. Every time I want to play a game I'm going into Device manager, installing the AMD generic mobility driver, then when finished re-installing the Dell driver just so I can put my laptop back to sleep.
I'm sure like many others, the only reason I purchased this laptop was for the 8870M and its ability to play games. Really need Dell to release some better drivers.