Ubuntu 16.04, Advanced Micro Devices, Inc. [AMD/ATI] Sun XT [Radeon HD 8670A/8670M/8690M / R5 M330 / M430]

I have Notebook HP 250 G5, Intel graphic 520 + Advanced Micro Devices, Inc. [AMD/ATI] Sun XT [Radeon HD 8670A/8670M/8690M / R5 M330 / M430].

Use Ubuntu 16.04 in dual boot.

After install amdgpu-pro-17.10-429170 (think right driver) no login and screen grey forever.

What can i do ? If there is solution, how can switch to and from Intel/Amd card ?

Must buy only nvidia card ? I think no please.

Best regard and ty for solution.

Alessandro