copied to new partition, UUIDs not correct

[MALsPa]

so try to update grub from debian.

With all due respect, why do you suggest this? (I have run update-grub in Debian many times since I copied Sabayon.)

[sabayonino]

I can try to understand your prbs. be patient

please paste Debian grub.cfg and Sabayon Grub.cfg

Maybe Debian doesn't see sabayon grub.cfg properly

[MALsPa]

Well. My custom menu entry works fine for booting into Sabayon. I'll just stay with using that, instead of trying to use a chainloader entry, until I get this figured out.

This is the only grub2-related problem I've had on my computers, but this is the first time I've copied a distro to another set of partitions with grub2 being involved. I've done it lots of times under grub-legacy; different situation, though.

Thanks for your attempts to help, sabayonino. Much appreciated.