The latest firmware for X370 Taichi, v5.50 (2019/4/24), removes the "Power Supply Idle Control" option off the configuration UI; downgrading is not supported (but effectively possible at least from Windows). It is still possible to set "Power Supply Idle Control" (C6 package) via MSR using e.g. /sbin/modprobe msr && /usr/sbin/wrmsr -a 0xC0010292 true during boot.
Luckily, this workaround may no longer be needed. While, with default 'BIOS' (actually UEFI firmware) settings on v5.50, Linux 4.18 still freezes during idle for me, it no longer does so on 5.1.2 (apparently - needs more testing - not on 5.0 either). -- 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
