I can’t find an active thinkpad centric community on here I am just going to post here. My Thinkpad T480s, 16 GB RAM, 238 GB SSD is randomly shutting off while at like 50%. When I try to open it back up it always is dead and I have to connect charger to boot it up again. Why is this happening? Is it battery issue? It complains about not being able to read temp2_input while shutting down and sometimes say PM usage count underflow. Not sure what that is supposed to mean.

  • tal
    2·
    1 year ago

    How do you determine your battery has 50% before it shuts down?

    Debian has a program in the battery-stats package that logs battery at a (by default) 30 second interval. That has a pretty graphing program too. I dunno if Arch packages that, but if not, not hard to roll your own.

    #!/bin/sh

while true; do
    echo $(date; cat /sys/class/power_supply/BAT0/energy_now) >> ~/battery-log
    sync
    sleep 10
done

    That’ll get you a capacity within ten seconds of the next shutdown. If you save that log, repeat it running until it dies a couple times, you can probably tell if it’s consistently at the same capacity that it goes down.

    If it really is consistently at pretty close to the same spot, then I’d guess that it’s battery-related in one way or another.