Exactly the same problem. I think the only relevant info on hardware is: 1) Ryzen 3 2200G, 2) ASRock AB350M pro4 motherboard. I use Win 10 Pro.
Latest UEFI (BIOS) updated.
I've tried several drivers packs:
ASRock (MB manufacturer) drivers pack: Allin1(v17.40.3301-WHQL)
I've tried uninstalling VGA drivers, then I get plain "microsoft generic driver"
Then I install AMD drivers back and I get the same yellow triangle when I check Device Manager: "Display Adapters"...
This device cannot find enough free resources that it can use. (Code 12)
If you want to use this device, you will need to disable one of the other devices on this system.
**** It Helped Me ****
I had build my rig over ( Ryzen 2200G , asus B350 m-k ) and Installed all Drivers properly , except VEGA 8 Graphics Driver..
Tried many forums but no Solutions found.
Contacted Ryzen Team , then one solution found
update your bios first
Its all windows 10 version problem...
You have to Update it to lattest version , i was having Windows 10 1038 build , that does not support new Ryzen VEGA graphics , so update Windows 10 to lattest build...
Then install VEGA 8 and YOHOO !