The PSU problem sounds like a weak excuse from AMD or may they are talking about very very bad 10 dollars units.
The BIOS options "typical/low current" doesn't seems to change the c-states set up by the kernel routines here. With any selection, I always end up with c0 POLL c1 ACPI HLT c2 ACPI IOPORT 0x414 as you can see with cpufreq cpupower idle-info or /usr/src/linux/tools/power/x86/turbostat/turbostat -n1 That happens because the firmware already informed the kernel mwait/monitor cannot be used for c-states. If idle=halt is used, there is no c-state management and the idl instruction is used to put a core in idle mode. I think it is the hyper treading handling that is somehow bugged, somewhere. Also note that many ryzen users overclock their machine and if you overclock, you have to c-state problems at all. -- 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
