[Bug 1122245] [NEW] booting from a cloud image hangs until virsh console is used

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on a quantal host:
  sudo virt-install --noautoconsole --network network=default --video cirrus --name selftest --ram 1024 --vcpus 2, --disk path=/caviar3/libvirt/installers/ubuntu/raring-server-cloudimg-amd64-disk1.img,format=qcow2 --boot hd --hvm

With raring-server-cloudimg-amd64-disk1.img downloaded from http
://cloud-images.ubuntu.com/raring/current/.

The graphical console (from virt-manager) will display some lines ending
with:

 [    0.000000] console [tty1] enabled

and the guest cpu is at 100%.

Running 'virsh console selftest' and typing return from the kbd will
unblock it.

After the boot completes, if I edit /etc/default/grub to remove ttyS0
from GRUB_CMDLINE_LINUX_DEFAULT="console=tty1 console=ttyS0" the hand
doesn't occur.

Related bugs:
 * bug 1016695: add console=tty1 to cloud-image kernel boot parameters
 * bug 1123220: cloud-image VM causes kernel panic if image is resized
 * bug 1061977: Machine fails to commission when console=ttyS0 is present on kernel opts

** Affects: libvirt (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: bot-comment
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booting from a cloud image hangs until virsh console is used
https://bugs.launchpad.net/bugs/1122245
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