It's grub-update, which is part of grub. Any time a kernel package is installed/updated, this script is executed.
For this reason I disagree with the rejection of this bug report by the grub maintainer! A grub script is changing a working system configuration into a non-working. This is most definitely a bug of the grub package. Now the root cause of this bug might well be in some other package but unless this has been determined _AND_ fixed, please stop converting the boot options. -- LVM/MD root filesystem not found by uuid https://launchpad.net/bugs/54002 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs