I had the same problem because the /boot/efi partition was formatted in
HFS+ file system. But grub-install doesn't allow this, even if it
mounted as read-write.
Previously the /usr/sbin/grub-install file was a script and I have commented
this check. Now it's binary file so I can't do this.
Example of disabling efi partition check if /usr/sbin/grub-install file is
script:
if test -n "$efidir"; then
efi_fs=`"$grub_probe" --target=fs "--device-map=${device_map}" "${e$
# if test "x$efi_fs" = xfat; then :; else
# gettext_printf "%s doesn't look like an EFI partition.\n" "${ef$
# efidir=
# fi
fi
So I have come up with the next hack:
1. Backup all files from /boot/efi partition
2. Format /boot/efi partition to FAT file system and mount it to the /boot/efi
path
3. Copy all files backed up from the original /boot/efi partition to the new
one
4. Run `sudo grub-install` and `sudo dpkg --configure grub-efi-amd64`. Should
complete successfully.
5. Backup all files from the /boot/efi partition after successful grub
upgrade/install
6. Format /boot/efi partition to HFS+ file system and mount it to the /boot/efi
path
7. Copy all files backed up from the /boot/efi partition after grub
upgrade/install to the new one
8. Update /etc/fstab to mount the /boot/efi partition during boot
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https://bugs.launchpad.net/bugs/1282375
Title:
trusty upgrade: grub-install fails with odd file error
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