I'm running Ubuntu 18.04 on Ryzen 2400g with 4.17rc kernel with no issues. In stock 4.15 I'm having some issues with vega(g) part of CPU. X shouldn't have this

I'm running Ubuntu 18.04 on Ryzen 2400g with 4.17rc kernel with no issues. In stock 4.15 I'm having some issues with vega(g) part of CPU. X shouldn't have this problem.