Hello everyone !

I have no idea if I’m in the right community, because it’s a mix of hardware and some light code/command to extract the power consumption out of my old laptop. I need some assistance and if someone way more intelligent than me could check the code and give feedback :)

Important infos

  • 12 year old ASUS N76 laptop
  • Bare bone server running Debian 12
  • No battery (died long time ago)
  • Running a dozens docker containers.

Because I have no battery connected to my laptop I’m unable to use tools like lm-sensors, powerstat, powertop. But from the following ressource I can estimate the power based on the Energy.

time=1
declare T0=($(sudo cat /sys/class/powercap/*/energy_uj)); sleep $time; declare T1=($(sudo cat /sys/class/powercap/*/energy_uj))
for i in "${!T0[@]}"; do echo - | awk "{printf \"%.1f W\", $((${T1[i]}-${T0[i]})) / $time / 1e6 }" ; done

While It effectively outputs something, I’m not sure if I can rely on that to estimate the power consumption.

Thanks :).

  • atzanteol@sh.itjust.worksEnglish
    0·
    1 year ago

    It will give you the maximum of what the power supply is capable of providing which is nothing like what the laptop actually uses.

    • Still@programming.devEnglish
      0·
      1 year ago

      all the laptops I’ve ever had have been able to reliability pull the full power (like within 30 watts) of their power adapter rating so that’s a good estimate

      • N0x0n@lemmy.mlOP
        0·
        1 year ago

        I’m not sure about that. Specially because it’s used as a bare bone server without any GUI with the lid closed. So it will draw way less power than showed on the charging brick.