Package: grub2 Version: 2.02~beta2-36 GRUB's efidisk support does not respect the buffer alignment specified by the UEFI block io protocol. This causes complete disk i/o failure on platforms where this actually matters - such as with the built in SATA controller on the ARM Juno development platform, but effectively works only by accident anywhere else.
Upstream commit 51f375d688529b7c1819ba40188ee52b9333887c resolves this issue. Could it be cherry-picked? http://git.savannah.gnu.org/cgit/grub.git/commit/grub-core/disk/efi/efidisk.c?id=51f375d688529b7c1819ba40188ee52b9333887c Regards, Leif
