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My Thinkpad T480s randomly dies with Arch Linux
(sh.itjust.works)
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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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When you say you need to connect the charger to get it to boot up again, do you mean boot to Linux or even to just show the BIOS? If the former, it might be that the battery level isn't being read correctly by the OS, but if it's the latter, the battery or its related circuitry is likely failing and you'll need a replacement battery.
I dosen't show BIOS no signs of life until charger is plugged in.
In that case, I don't think the problem is with Arch. The battery is likely shot, as going from partly charged -> dead that quickly is a very common symptom of one that's reached the end of its life.