Charging-sdl

This is an application developed by the postmarketOS community to display the charging status when the device is powered on in "charge mode".

It is written in C and uses SDL2/SDL_power to query the battery information. The package is part of postmarketOS's aports.

Reporting issues
Issues with  should be reported on the project GitLab issues page.

Current implementation
Connecting the usb cable to the phone while it's powered off should start the device as usual and in the initramfs it should detect that it's started in "charge mode", showing the  for 5 seconds.

You can show this  screen again for another 5 seconds by pressing the power key.

will show a lightning icon in the top left of the screen when the battery is charging, and if you unplug it the icon should disappear.

Run charging-sdl manually
You first have to boot the device into the. (See Inspecting the initramfs)

After you connected to the device using telnet, you can run:

Charge mode not detected
In order to detect if the device has been powered on in "charge mode", the initramfs script looks for specific options in the kernel cmdline (e.g.: androidboot.mode=charger).

Kernel cmdline is the arguments Linux uses to boot. See this example.

Compare your kernel cmdline when powered on normally to when you power on by connecting the usb cable only. If you find a specific option to distinguish the two boot modes, please update the initramfs script.

DirectFB/FBDev: No supported modes found in /etc/fb.modes and current mode not supported!
See osk-sdl troubleshooting page