From the AMD website

Advisory:
The display driver supplied by the laptop manufacturer is customized for the built-in flat panel display, and the graphics features and functions specific to the laptop. It is strongly recommended to use the supplied drivers.
If installing a different operating system other than the one included with the laptop, the laptop may not meet all the requirements, and supported drivers may not be available.
The laptop manufacturer is the exclusive provider of driver updates. If the required driver update is not available at the laptop manufacturers’ website, it is recommended to contact the manufacturer directly, to see if an updated driver will be made available in the future.
AMD cannot provide driver updates directly from AMD.com.