Hello there. I read most of the thread a week ago. My machine was freezing when idle and when not idle. I read most of this thread and thanks to it got a stable setup.
@Daniel: When you say that you think the problem is fixed, do you know what change/Linux version fixes the issue for most people? ------------- Now my report. I have the following setup: Motherboard: AB350M-DS3H (F23d BIOS). CPU: Ryzen 2700X. No overclock. I still wonder whether my CPU is doing too much extra work (I don't know what cpufreq would report if a C6 state was reached). cpufreq stats: CPU 0: 3.70 GHz:6.64%, 3.20 GHz:1.15%, 2.20 GHz:92.21% CPU15: 3.70 GHz:4.86%, 3.20 GHz:0.80%, 2.20 GHz:94.34% Anyway, to make the things work I had to use three tweaks. I tried individual tweaks to no avail. - Select in BIOS: "Typical Current Idle" - Start Linux with: idle=nomwait - Disable C6 states (both core and package) with Zenstates.py Before doing the last step Zenstates.py reports Core enabled and Package disabled. I'm using Ubuntu 18.04.01 LTS. I didn't compile Linux with CONFIG_RCU_NOCB_CPU / CONFIG_RCU_NOCB_CPU_ALL. So, things are working for me. But if you think I should test a new Linux version that is supposed to fix the issue please let me know. -- 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
