The workaround of populating a /target/etc/fstab for the / partition from tty2 right before the GRUB install resolved it for me.
-- Karmic: legacy grub-install fails, possibly due to missing /target/etc/mtab https://bugs.launchpad.net/bugs/465231 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs