HP Laptop drains battery while turned off

tubbadu@lemmy.kde.social to Linux@lemmy.ml – 79 points –

Hello! My girlfriend's HP laptop running kubuntu 24.04 has this problem: when it's turned off (either from the GUI or poweroff) it discharges overnight, from 100% to 0% in a few days.

I searched the web to look for fixes:

  • wake on lan is disabled in the BIOS
  • USB ports have no settings in the bios, but there's nothing connected to them anyway
  • the system is actually powered off, not sleeping (at least if poweroff actually works)
  • everything, firmware included, is up to date

She doesn't remember having this problem from the beginning, but cannot tell when this started occurring

Did any of you ever encounter this problem? I don't know what else to do, and it's quite annoying.

Thank you for your time!

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There's a feature to allow charging from USB ports while a computer is off, Lenovo calls it "Always on USB." That feature is constantly using power even when nothing is plugged in. To test if any ports have that feature power off the computer then try plugging in a simple 5v 500ma usb device to charge. If it starts charging then it has that feature and will drain power. If no options to disable in BIOS then as far as I know stuck :(

I've worked on a couple recent gen refurb laptops (dell and lenovo) with that feature but lacking any disable option in BIOS. I've tried to get into the habit of plugging in whenever not being used but still end up with things empty more often than I like. Very frustrating and I think only hope is future bios update to give that option.