Comment 435 for bug 1690085

(In reply to Daniel Phillips from comment #349)
> I am happy to report 45 days of continuous uptime with "typical current
> idle" selected in bios, and otherwise vanilla everything including 4.15.0
> kernel. My system configuration is as posted above.

With my Ryzen 7 1800X and Asus X370 Pro: I can report that with the magic "typical" BIOS setting I have today 30 days uptime. This is more than twice the previous record.

FWIW: I am so fed up with this machine that I haven't used it since I updated the BIOS and applied the setting. It is running 4.16.5 (Fedora 27), with CONFIG_RCU_NOCB_CPU and rcu_nocbs=0-15. I don't know if the rcu_nocbs=0-15 is still required.

Also FWIW: zenstates.py -l tells me that C6 Package is Disabled, but C6 Core is Enabled. Before the BIOS update I used zenstates.py to set C6 the same way, but the machine froze after some 12 days. After the BIOS update I no longer use zenstates.py to set anything. So I guess the BIOS "typical" option disables C6 Package, but also does some other magic.

> I suspect that the truth is, some power supplies just do not expect such low
> full system power draw, and freak out about it. Without "typical current",
> mine is 38 watts at the wall including 32GB of memory, but unfortunately,
> only lives a few days at that setting.

Mr BeQuiet! are adamant that the Straight Power 11 I have is perfectly happy to supply 0A at all voltages.

Of course, there's a lot of stuff between the PSU and the CPU... so it could be a motherboard issue. Who can tell ?

Possibly, some day, I will go back to using by AMD machine, but I doubt I shall come to be fond of it :-( Certainly I am livid with AMD's abject failure to address the issue promptly, and their continuing inability to discuss or document the issue. Bugs happen. It's how they are dealt with that separates the sheep from the goats. <sigh>