Hi, I'm a Vega 56 user from Taiwan.
I discovered that when I use the auto undervolt GPU function and Shut down or Sleep my PC, the MB will not even power up after.
Then I plug the DP cable to the internal graphics(i7-7700) , it will power up.
I think is Radeon's problem, so I default the Wattman setting and the DP cable is on my Vega 56, then it power up as normal as it usually be.
Is this only happen on me or someone has the same problem?