Feature request: Power draw

[lightonflux]

trafficstars

I would really like to see power consumption in W. Maybe with the current value as a label. So instead of "Power Draw" the label would be "12W" for the total power consuption of the system.

Problem is i don't know where to get this info. On laptops you can check /sys/class/power_supply/BAT0/power_now¹ but this does not work when plugged in or on a desktop.

1: https://unix.stackexchange.com/questions/10418/how-to-find-power-draw-in-watts

[jorchube]

According to that same stackexchange question, one could use voltage_now and current_now to derive the power consumption. In my desktop I have both available under /sys/class/power_supply/ucsi-source-psy-0-00081/.

Problem is, both are reporting 0. Can you check if you have something similar exposed and reporting something other than 0? Also, what OS and hardware setup do you have?

[lightonflux]

I have three symlinks in power_supply:

» ls        
AC@  BAT0@  hidpp_battery_0@

BAT0 has only ./voltage_now. The other two have nothing.

The OS is Fedora (Linux 6.0) and the hardware is a Thinkpad X13 Gen 2 AMD.

And i cannot find a common interface that reports the power draw. sensors reports at least voltage:

amdgpu-pci-0500
Adapter: PCI adapter
vddgfx:      849.00 mV 
vddnb:       874.00 mV 
edge:         +41.0°C  
PPT:         1000.00 uW 

BAT0-acpi-0
Adapter: ACPI interface
in0:          17.27 V  

[jorchube]

I don't see how this can be done in a consistent way, but I'll keep an eye on it.