Ryzen/Vega laptop PCIe Bus Error

OK, pretty much a full day uptime, 12 hours videoplayback, three of those Ryan’s PGP stream, couple hours mprime -t, couple hours unigine-valley and now idling most of the time.

I wouldn’t call this completely fixed because it still needs the flags to work and it also drains more power than it would without them. But for now I would say this is the solution for anyone on mobile RR.

Add "rcu_nocbs=0-7" and "processor.max_cstate=1" in grub.