Comment 5 for bug 364916

The -virtual kernel package should contain the acpiphp module. The intent of
that package is to be used by virtual machines, and those machines should be
able to use kvm's pci hotplug. That can be accomplished as I described in
comment 4. Can we please have that done?

The documentation on setting up Eucalyptus right now
(https://help.ubuntu.com/community/Eucalyptus) suggests using
/boot/vmlinuz-2.6.. and /boot/initrd.img-... for guest kernel and initrd
respectively. The problem is that on a ubuntu system that will not result in
functional pci hotplug support in the guest.

Etienne suggested changing CONFIG_HOTPLUG_PCI_ACPI to 'y' in kernel config.

The other solution would be to get acpiphp.ko into the initrd that the user is
told to use. That can be accomplished by adding it to
/etc/initramfs-tools/modules and running update-initramfs prior to 'ec2-bundle-image' and 'ec2-upload-bundle'.