Apparently, I may be able to load Debian 12 using the Galaxy Chromebook’s U-Boot loader. Though, after selecting U-Boot from the alternative bootloader menu, it freezes for about 10 seconds before showing the U-Boot console. The auto-boot fails and it freezes.
How would I move forward from here? I already have a net install of Debian 12 ready on my SD card.
As the official Chrultrabook team doesn’t support ARM Chromebooks yet (it’s in the works) and as we haven’t been given the name of this machine’s board, I’d recommend you look at alternative projects here: https://wiki.postmarketos.org/wiki/Devices
…or look into the possibly-relevant Debian install instructions from their wiki here:
Are you talking about the Arm Samsung galaxy Chromebook? If so, use hexdump0815’s images at Releases · hexdump0815/imagebuilder · GitHub. It is meant for Arm chromebooks. In the search bar, search for anything related to Samsung, etc.