Comment 55 for bug 1690085

The workaround discussed at http://blog.programster.org/ubuntu-16-04-compile-custom-kernel-for-ryzen fixes the recurring (roughly once or twice in 6 hours of operation, during low or idle CPU load periods) system freezes for this Ryzen 7 1800X (early weeks), AMD microcode 0x8001129, ASRock X370 Taichi (Firmware P3.20, BIOS 5.12, Release Date: 09/08/2017) system running XUbuntu 16.04 LTS (with latest updates)

All the mainline kernels up to linux-image-4.13.10-041310-generic, and official Ubuntu kernels (default 16.04 kernel, hwe) all kept freezing - although I had only tested them without "rcu_nocbs=0-15". I did test hwe-edge (4.10.0.20.13), both with and without "rcu_nocbs=0-15". Both variants gave me freezes.