Comment 12 for bug 412437

Upgrading from 9.4 to 9.1 has messed up my dual boot. Just discovered cannot boot my XP install on this machine the suggestion to edit /etc/default/grub does not work for me no such file exists to edit. Also when creating an upgrade that changes something as fundamental as how the machine boots to something not backwards compatible a BIG RED warning notice should be made prior to any install. this has rendered half my machine useless and will take days of google research on how to manually fix the result of this upgrade.