Spent the afternoon trying to get my 3500U to downclock to anything lower than 1.4GHz... long story short, amd_pstate is gatekept by Lenovo's unwillingness to allow us to enable ACPI on the BIOS of the Thinkpad T495, where there is a huge amount of people complaining about this and yet no BIOS update has been provided... some work is ongoing on kernel 6.8+ to bring compatibility to AMD APUs but we are not there yet... Of course, if I had Windows, this works, regardless of the BIOS. So there's that. I'll wait for the geniuses to crack this CPU power savings and underclocking. Meantime? Will carry my laptop charger, just in case I need to juice it up.