Comment 279 for bug 1690085

I want to share my findings. Today I googled for "Ryzen C6 state" and found this reddit thread: https://www.reddit.com/r/Amd/comments/7ita4h/why_its_suggested_to_disable_c6_and_cstate_global/

The last comment regarding DRAM "Power Down Enable" and instabilities combined with C6 raised my interest. So I searched the UEFI of my ASrock AB350 Pro4 and found that option, but it was already disabled - but perhaps it's worth to look into if you experience idle freezes.

But I found another interesting option called "Power Supply Idle Control". Didn't find much documentation about it except: https://lime-technology.com/forums/topic/61767-amd-ryzen-update/?tab=comments#comment-607258

As was mentioned before AMD claims that's the idle freezes are related to the PSU. I don't think my PSU isn't able to support that low power mode but here http://forum.asrock.com/forum_posts.asp?TID=6832&title=ramocvoltagecantlowerthanxmpvoltageb350pro4-420
someone states, that the "Typical current Idle" setting changes the idle voltage of the cores. Perhaps that might make a difference?
Anyone tried that?

I've set it to "Typical current Idle" for now and we'll see. 3h of idle uptime so far - not bad :-)

Oh, and I was a little bit astonished to see my AGESA version shown in the UEFI to be 1.0.0.1a. If anyone wonders like me, it seems, that AMD has reset the versioning for whatever reason.