Issue #448 has been updated by Karsten Schnier.

Description updated
Related links updated

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Bug #448: Thinkpad T440P ACPI Battery Value Issues
https://ticket.coreboot.org/issues/448#change-1438

* Author: Karsten Schnier
* Status: New
* Priority: Normal
* Target version: none
* Start date: 2023-01-11
* Affected versions: master
* Related links: https://github.com/linrunner/TLP/issues/657
* Affected hardware: Thinkpad T440p
* Affected OS: Artix / Arch Linux
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Hello,

I have been having some issues with TLP on my corebooted T440p. I am running 
artix linux with grub on top of coreboot (self compiled libreboot). I have had 
issues with the ACPI battery readings. Coreboot does not provide power 
readings, but instead only current readings. More details can be found in the 
TLP github issue: 
https://github.com/linrunner/TLP/issues/657#issuecomment-1293730559.

This causes TLP to not recognize the thinkpad and go to default mode. 
Additional, it prevents recalibration of the battery even when the thinkpad 
battery driver is forced. Is this due to misconfiguration in the coreboot build 
or issues with coreboot itself?

Finally, is there a method to change the /sys/class/dmi/id/product_version 
string? As of now coreboot only reports "1.0". This prevents some methods of 
board identification from working.

Thank you! 



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