As explained in previous comments (and discussed in person with Colin King), this is not something we feel we can safely fix in grub; as such, I'm opening a task on ubuntu-release-notes so that we document this as part of any documentation about upgrading in-place to ext4.
As explained in previous comments (and discussed in person with Colin King), this is not something we feel we can safely fix in grub; as such, I'm opening a task on ubuntu- release- notes so that we document this as part of any documentation about upgrading in-place to ext4.