What driver version are you using? Please use Catalyst drivers and not Crimson as switchable graphics functionality is not present on the Crimson drivers.
ATI Radeon Crimson Edition - Windows 7 SP1 / Windows 8.1 / Windows 10 Wersja 15.11.1 Beta x64
Catalsys ATI Radeon Windows 7 SP1 / Windows 8.1 / Windows 10 Wersja 15.11 Beta x64
i used all version all time same problem whit code 31 only in windows 10 in windows 7 works HD 6550D device menager see me both card. but in windows 10 the premiere is the trouble. sorry for me engilsh is sux...
when I have included both cards is I do not want to install any drivers so I had to disable the onboard then at least I installed the r7 250X but then there is this problem with integrated card Code 31