Regarding comment #13 -- The error messages are cosmetic. It is caused
by the "virtual" partitions in EC2, where a raw disk is presented as a
/dev/{s,xv}da1 when /etc/kernel/*/zz-update-grub is executed. The kernel
update script that handles the kernel updates on EC2 is /etc/kernel/*/x
-grub-legacy-ec2. On both instance-store and EBS instances, there is no
need for to run zz-update-grub, since the paravirtual grub (pvgrub) is
being run outside the instance. However for HVM instances, we are using
Grub2 to boot the images.
Essentially, the scripts should be mutually exclusive. In order to fix
this problem, there needs to be a mechanism for deciding which one
should run -- for example if it is running on bare metal or HVM, then it
would run the zz-update-grub, but if it was running on EC2-like
hardware, it would run x-grub-legacy-ec2.
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https://bugs.launchpad.net/bugs/759545
Title:
user prompted to update unmodified grub configuration during Ubuntu
server upgrade
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