Ben,
  Please do not change the images just yet.
  I'd really rather not make a change without knowing explicitly what happens 
in each case of the following, given the command line 'console=tty1 
console=ttyS0':

a.) kvm -nographic
b.) no serial device present

For each of these, where does console output end up?

I'm also concerned about arm arch, where ttyX might not be meaningful.
It seems likely that the kernel has sane behavior, but I'd like to know
for sure.

case 'b' is (I believe) the case that is affecting Jeremiah.  Because
there is no serial device, the kernel then is selecting tty0 as the
/dev/console device, and upstart is putting 'console output' cloud-init
job output there.  However, in the case where there *is* a serial
device, I honestly cannot understand how the tty1 param would change
anything.

The change does seem reasonable, but I just want to avoid making
arbitrary changes that we do not completely understand.

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https://bugs.launchpad.net/bugs/1016695

Title:
  add console=tty1 to cloud-image kernel boot parameters

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