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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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My Thinkpad T480s randomly dies with Arch Linux (sh.itjust.works)

submitted 11 months ago by 257m@sh.itjust.works to c/linux@lemmy.ml

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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.

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[–] moreeni@lemm.ee 1 points 11 months ago (2 children)

There are lots and lots of possible reasons for this to happen, so people will need some more information to help you find the issue.

Are you able to boot it at all after it shuts down? How often does it "randomly" get shut down? How do you determine your battery has 50% before it shuts down? Can you check if it happens on other operating systems? What does "it complains" mean, is it a warning in journalctl? Also, please post precise outputs of any errors you might see in journalctl at the time it shuts down.

[–] tal 2 points 11 months ago* (last edited 11 months 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.

[–] 257m@sh.itjust.works 1 points 11 months ago

I am using upower to determine the battery status. It happens once every day or so. It posts the messages in the tty as it shuts down. systemctl schedules the shutdown slightly ahead of time.