Power Saving on hardware that doesn't support CPU Governor?

[Adam718]

I recently bought a Citrix SD-WAN 1100 with an Atom C3758 CPU.

It consumes 25W on idle load, which is a bit higher than I would like, and that's after running powertop autotune.

All the powersaving guides and threads I see point to modifying the CPU governor and configuring it for powersave or conservative. The problem is my hardware doesn't seem to have options like this.

# cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_available_governors
cat: '/sys/devices/system/cpu/cpu*/cpufreq/scaling_available_governors': No such file or directory

In fact, it doesn't seem to have many CPU monitoring functions at all. Even when accessing the BIOS over serial, I can't find any options for enabling CPU power options.

Is there anything left I can do to try and reduce power consumption?

 

[leesteken]

Maybe it uses Intel pstate instead? This is not Proxmox specific, so other guides for your system and Linux power management would probably apply too.