I'm aware hardware support on Qubes has been problematic for some users. Luckily, it's looking to get a lot better with the up-and-coming Qubes R4.1 (currently on it's first release candidate). It will be shipping with a fully updated base hypervisor and kernel feature set to allow support for newer hardware.

I'm not quite sure the specifics of your hardware problem, but, feel free to file a bug on the Qubes issue tracker.