Bug 509249

Summary

Battery Threshold Persistence Issue


Description

My laptop supports setting the maximum charge threshold at which the battery stops charging. I found this option in System Settings > Power Management > Advanced Power Settings. It allows users to set a Charge Limit and stop charging at the specified value (usually 80%). This feature works as intended, but the setting does not persist after a reboot; it resets to 100%. 

As a workaround, I created a script as follows:

```bash
#!/bin/bash
echo 80 | sudo tee /sys/class/power_supply/BAT1/charge_control_end_threshold > /dev/null
```

I added this script to `~/.bash-profile` and configured it to execute without sudo by editing the sudoers file with `visudo`. However, I expected this setting to persist across boots out of the box.


Steps to Reproduce

1. Go to System Settings > Power Management > Advanced Power Settings.
2. Set the Charge Limit to 80%.
3. Reboot the laptop.
4. Check the charge limit again; it should reset to 100%.


Expected Result

The charge limit should persist across reboots.


Actual Result

The charge limit resets to 100% after rebooting.


Environment

Operating System: Fedora Linux 42
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.1
Kernel Version: 6.15.9-201.fc42.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 6 × 11th Gen Intel® Core™ i5-11400H @ 2.70GHz
Memory: 8 GiB of RAM (7.5 GiB usable)
Graphics Processor 1: Intel® UHD Graphics
Graphics Processor 2: NVIDIA GeForce RTX 3050 Laptop GPU
Manufacturer: ASUSTeK COMPUTER INC.
Product Name: ASUS TUF Gaming F15 FX506HC_FX506HC
System Version: 1.0