YES the boot option alone has no effect, you must also compile the kernel with CONFIG_RCU_NOCB_CPU. You should be fine now (I have this confirmed on several different configs). Here's a tutorial: http://blog.programster.org/ubuntu-16-04-compile-custom-kernel-for-ryzen
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1690085 Title: Ryzen 1800X freeze - rcu_sched detected stalls on CPUs/tasks To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1690085/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs