On Wed, Sep 17, 2025 at 19:45:18 -0400, Jeffrey Walton wrote: > Isn't the os-prober disabled nowadays? I think that would explain why > other Linux installations are not being found.
It's disabled by default. If you need to use it, you are instructed to edit a config file to enable it. https://www.debian.org/releases/bookworm/amd64/release-notes/ch-information.en.html#grub-os-prober
