Thanks Loic! I fixed up the patch to apply, and uploaded to https://launchpad.net/~pitti/+archive/ppa for easier testing. I installed that on my test system, called update-grub2, and now grub.cfg is correct and I can boot the old system.
grub-common's postinst should probably call update-grub2 on updates to this version.
Thanks Loic! I fixed up the patch to apply, and uploaded to https:/ /launchpad. net/~pitti/ +archive/ ppa for easier testing. I installed that on my test system, called update-grub2, and now grub.cfg is correct and I can boot the old system.
grub-common's postinst should probably call update-grub2 on updates to this version.