Quill OS is a libre software replacement for Kobo eReaders and is currently looking for wizards.
GitHub - Quill-OS/quill: An open-source, Qt-based eBook reader for Kobos (and other devices).
Edit: Support for Kobo devices, other brands with the same hardware might work as well.
Sucks to hear about secure boot and the color models - hopefully someone's able to find a way around that eventually
and fuck Kobo for the enshittification of their devices
Good on them calling it out directly.
One of the main reasons many people purchased a Kobo was to run quill. Those morons just cut off that market segment. A small segment, I know, but still a segment they just amputated.
Yeah, I was very excited after I heard they could run basically anything you put on the internal SD. It's hardware 'made' for Linux without the extra price bc nobody outside the tech bubble cares.