[arch-general] Power Management on Thinkpad 5W30

[naicam|ne]

I can't get power management working on my laptop. I have tlp-stat 
installed and it's showing a 1.9% capacity, but I don't think that's an 
accurate figure. This is a fairly new install. It worked fine under windows.

I've been trying a lot of things, but at this point it feels more like 
I'm just going to do more damage trying things than actually making any 
progress on my own.

One thing I don't know about is if this model supports the thinkpad_ec 
kernel module, because I cant get it to load. I'm also running the 
hardened kernel, and don't know if that's supported either.

I'm not sure at this point that thats even the right direction to be 
going in.

But this https://wiki.archlinux.org/title/Laptop/Lenovo#W_series says 
that power management is supported, and this 
https://www.thinkwiki.org/wiki/Tp_smapi#W_series seems to indicate that 
tp_smapi -doesn't- work with this model, but that's a little unclear to 
me, especially since that page was last updated in 2016.

But simply setting the thresholds manually hasn't given me very good 
results at all.

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