The problem seems to be also that your grup-install target is a FAT partition:
Nov 3 02:58:26 ubuntu 10freedos: debug: /dev/mmcblk0p1 is a FAT partition (mounted by GRUB) which later gives the Nov 3 03:23:11 ubuntu plugininstall.py: ubiquity.install_misc.InstallStepError: GrubInstaller failed with code 1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1074555 Title: 12.10 grub-install faltal error - on installing on FAT partition To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1074555/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs