I have a couple of Threadrippers (1950X) that also hang under very specific workloads with a Asus X-399-A motherboard. In my case when the freeze happens the only way to get the machine back is to unplug it from the wall and plug it back. Not even reset works.
After many tweaks, I found out that I can avoid that but setting either the "overclocking enhancement" on in the BIOS (this is specific to Asus boards) our manually setting the Vcore to something like 1.315V (which should work on all motherboards). My guess is than when in idle the motherboard drops the voltage too low and the CPU hangs. -- 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
