My testing implies that the fix I've committed to the build scripts [1] will
resolve this issue.
Heres what I did to test:
* ran 3 instances of ami-a29943cb (us-east-1
ebs/ubuntu-precise-12.04-amd64-server-20120424)
a.) control instance [verified config-changed prompt]
apt-get update && apt-get install grub-pc
b.) no user-data instance
DEBIAN_FRONTEND=noninteractive dpkg-reconfigure grub-pc
apt-get update && apt-get install grub-pc
# verified no grub prompt
c.) user-data that disabled running of grub-dpkg module in cloud-init
DEBIAN_FRONTEND=noninteractive dpkg-reconfigure grub-pc
sudo cloud-init-cfg grub_dpkg
apt-get update && apt-get install grub-pc
# verified no grub prompt
'c' was necessary above, because cloud-init modifies debconf preseed
values in grub on first boot. I was concerned that having run 'dpkg-
reconfigure grub-pc' in the build process, then booting and having
cloud-init modify some portion of grub-pc debconf, then upgrading could
cause a similar issue. It did not.
After we get images built with this change in them, we can verify that the
issue is fixed by:
* launching an instance of quantal or precise with serial > 20120607
* adding a repository with a grub update (possibly a ppa with just a grub
rebuild)
* apt-get update
* apt-get install grub-pc
--
[1]
http://bazaar.launchpad.net/~ubuntu-on-ec2/vmbuilder/automated-ec2-builds/revision/485
** Changed in: grub2 (Ubuntu Precise)
Status: In Progress => Fix Committed
** Package changed: grub2 (Ubuntu) => ubuntu
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https://bugs.launchpad.net/bugs/1009294
Title:
Grub update breaks automated dist-upgrade scripts on AMI images
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