Comment # 7 on bug 106670 from Michel Dänzer

(In reply to JerryD from comment #6)
> I used grubby to add to my kernel boot command 'idle=nomwait' and the
> problem seems resolved. The mwait instruction is known to possibly hang
> threads on some earlier released ryzen chips as documented in the AMD Errata.

Thanks for the follow-up, resolving accordingly.