Disable C6 states still necessary?

[nadbmal]

In 2018 or so when I set up my Ryzen 1700X based Unraid server I ran into an issue where the computer would randomly lockup after being idle. Somewhere I read that disabling C6 states by putting

/usr/local/sbin/zenstates --c6-disable

into my /config/go file would fix it and sure enough it did. It's been rock solid since then, I've gotten over >100 days uptime multiple times, only restarting for Unraid updates basically. 

 

But I believe this disables some kind of power saving features of the CPUs, so i'm wondering if it's ok to remove this line nowadays or if it's still a necessity? Ryzen on Linux was kinda new when I built this machine, but maybe it has matured by now?

 

Would be nice to save a couple of watts... on the other hand "if it aint broke dont fix it" etc.

[JorgeB]

It should be fine to remove as long as "power supply idle control" is correctly set in the BIOS, see here:

 

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=819173

 

[sonic6]

Hi, i am using an Opteron x3418 in my HPE Proliant Microserv Gen 10. Is this also and still relevant for an Bulldozer - Opteron X - Toronto Wiki with Unraid 6.9.0 RC2 and further versions?

Edited January 4, 2021 by sonic6