Julien Lepiller <julien@lepiller.eu> writes:

> One way to find the missing modules is to boot another distro (or
> maybe the installer has a lot more modules than the installed system)
> and look at dmesg. You might see something like:
>
> scsi host0: ahci-sunxi
> ata1: SATA max UDMA/133 mmio …
>
> sunxi-mmc 1c12000.mmc: initialized, …
> mmc0: host does not support reading read-only…
>
> (That's from an arm board)
>
> In that case, I added sunxi-mmc, ahci_sunxi and for some reason
> sd_mod. Note that naming is not consistent between guix and dmcsg, so
> check the filename in lib/modules of you linux-libre kernel package.
>
> HTH!

Thanks for the tip, reading the dmesg output for a system that boots was
helpful!