The same has been reported on a BIOS system too (arraybolt3 #lubuntu-devel):
> grub-install --target=i386-pc --recheck --force /dev/sda > Installing for i386-pc platform. > grub-install: error: unknown filesystem.
The same has been reported on a BIOS system too (arraybolt3 #lubuntu-devel):
> grub-install --target=i386-pc --recheck --force /dev/sda
> Installing for i386-pc platform.
> grub-install: error: unknown filesystem.