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#1 2025-04-07 10:08:07

rudolf_schlepke
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From: Ukraine
Registered: 2021-02-27
Posts: 22
Website

[SOLVED] ASUS Laptop battery charge threshold issue?

I really hate to create new topics on this, but I cannot find any information on more advanced charge threshold configuration.

I have a ASUS VivoBook M433IA laptop, running LTS kernel and GNOME DE. To control charge threshold, as per this Wiki article I am using the "bat-asus-battery-bin" AUR package. But the peculiarity of the situation is that when I have my laptop plugged in with the power supply brick for longer periods of time (working), the battery still drains below the set threshold (which is 75%). This results in surge charging and battery degradation.

I checked "/sys/class/power_supply/BAT0/" directory, and I see only the "charge_control_end_threshold" file, which controls the upper bound of the battery charge. But I DO NOT see the "charge_control_start_threshold" file, which controls the lower bound of the battery charge level. And, using GNOME 48, I do not see any battery charge limit setting in the control center either.

So the question is:
Is it a firmware issue? The laptop does not announce this setting to the kernel? Because I'm running latest firmware for my laptop (from 2023, no updates since then), and I do have "asus-nb-wmi" kernel module enabled (albeit, NOT early loaded).

Last edited by rudolf_schlepke (2025-04-13 15:52:09)

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#2 2025-04-13 15:51:28

rudolf_schlepke
Member
From: Ukraine
Registered: 2021-02-27
Posts: 22
Website

Re: [SOLVED] ASUS Laptop battery charge threshold issue?

I think I've found the answer. The "asus-nb-wmi" does not seem to be advertising the "charge_control_start_threshold" file to the sysfs. Case closed.

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