Booting live OS from encrypted LUKS partition in GRUB2

[Thomasheidler]

Hello,

I have GRUB2 as a payload in coreboot and I am trying to have it load Trisquel 7.0 Live
(Test Trisquel without installing) from an encrypted LUKS partition on a USB flash drive.
I am able to decrypt the LUKS container and GRUB finds the Trisquel ISOLINUX menu, but
fails to load the OS. When I try to manually boot it with commands (linux, initrd, boot)
it starts loading the kernel, but then halts when it detects the USB flash drive and drops
into BusyBox.

Does anybody know how to overcome this problem and properly boot Trisquel in live mode
from an encrypted LUKS partition in GRUB?

Thanks.