Comment 313 for bug 1690085

>
> As I could read elsewhere [1], this option would disable C6 states among
> others. so, using zenstates.py to switch off c6 states would be the same
> "solution".
>
> [1] https://www.gamingonlinux.com/forum/topic/3207/post_id=14714

This does not seem to be true for all motherboards. I have a B350 Tomahawk from MSI and I updated the BIOS today. In its last BIOS it has this new Power Supply Option that can be set to Auto, Low current idle, Typical current idle. The default is auto.

I have changed it to both Low and Typical current and checked the possible states using zenstates.py -l and in both cases I get:

P0 - Enabled - FID = 88 - DID = 8 - VID = 20 - Ratio = 34.00 - vCore = 1.35000
P1 - Enabled - FID = 78 - DID = 8 - VID = 2C - Ratio = 30.00 - vCore = 1.27500
P2 - Enabled - FID = 84 - DID = C - VID = 68 - Ratio = 22.00 - vCore = 0.90000
P3 - Disabled
P4 - Disabled
P5 - Disabled
P6 - Disabled
P7 - Disabled
C6 State - Package - Enabled
C6 State - Core - Enabled

So the C6 states looks enabled. I am now running it with Typical current idle to see if it improves stability. Next monday, when I get back to work I will see if the machine locked over the weekend, as usual, or not.