Comment 16 for bug 1402042

i put some code at
 https://code.launchpad.net/~smoser/+junk/di-boottest-lp1402042/

Ran that code, the output shows in output.log as attached.
Then, checked console logs of everything with:

$ for d in *; do [ -f "$d/serial-boot.log" ] || continue; echo === $d === ; echo == install == ; grep "Command line:" $d/serial-install.log; echo == boot ==; grep "cmdline:" "$d/serial-boot.log" | head -n 1; done
=== precise-p-proposed-amd64 ===
== install ==
[ 0.000000] Command line: url=http://192.168.1.131:9900//preseed foo_nocopy=1 priority=critical locale=en_US --- console=ttyS0 foo_copy=1
== boot ==
[stdout] Mon, 20 Jul 2015 13:54:53 -0400 cmdline: BOOT_IMAGE=/boot/vmlinuz-3.2.0-87-generic root=UUID=98ea5c2d-97e2-40e5-95c8-2269daed1c55 ro console=ttyS0 foo_copy=1 quiet
=== precise-q-proposed-amd64 ===
== install ==
[ 0.000000] Command line: url=http://192.168.1.131:9900//preseed foo_nocopy=1 priority=critical locale=en_US --- console=ttyS0 foo_copy=1
== boot ==
[stdout] Mon, 20 Jul 2015 14:04:24 -0400 cmdline: BOOT_IMAGE=/boot/vmlinuz-3.2.0-87-generic root=UUID=154fc34e-7b91-415e-beee-588b33a213e7 ro console=ttyS0 foo_copy=1 quiet
=== precise-r-proposed-amd64 ===
== install ==
[ 0.000000] Command line: url=http://192.168.1.131:9900//preseed foo_nocopy=1 priority=critical locale=en_US --- console=ttyS0 foo_copy=1
== boot ==
[stdout] Mon, 20 Jul 2015 14:13:38 -0400 cmdline: BOOT_IMAGE=/boot/vmlinuz-3.2.0-87-generic root=UUID=beb39c3a-0f06-4d65-bce0-a4ccd61fe00d ro console=ttyS0 foo_copy=1 quiet
=== precise-s-proposed-amd64 ===
== install ==
[ 0.000000] Command line: url=http://192.168.1.131:9900//preseed foo_nocopy=1 priority=critical locale=en_US --- console=ttyS0 foo_copy=1
== boot ==
[stdout] Mon, 20 Jul 2015 14:23:16 -0400 cmdline: BOOT_IMAGE=/boot/vmlinuz-3.2.0-87-generic root=UUID=af7b6809-4a6e-4526-b0f6-65fe4c37b2d3 ro console=ttyS0 foo_copy=1 quiet
=== precise-t-proposed-amd64 ===
== install ==
[ 0.000000] Command line: url=http://192.168.1.131:9900//preseed foo_nocopy=1 priority=critical locale=en_US --- console=ttyS0 foo_copy=1
== boot ==
[stdout] Mon, 20 Jul 2015 14:33:21 -0400 cmdline: BOOT_IMAGE=/boot/vmlinuz-3.2.0-87-generic root=UUID=9cfec217-a88f-4486-852c-7b31a27f47fa ro console=ttyS0 foo_copy=1 quiet
=== trusty-t-proposed-amd64 ===
== install ==
[ 0.000000] Command line: url=http://192.168.1.131:9900//preseed foo_nocopy=1 priority=critical locale=en_US --- console=ttyS0 foo_copy=1
== boot ==
[stdout] Mon, 20 Jul 2015 12:59:13 -0400 cmdline: BOOT_IMAGE=/boot/vmlinuz-3.13.0-57-generic root=UUID=0748e068-52a0-4621-935d-fca60ea120ff ro console=ttyS0 foo_copy=1 quiet
=== trusty-u-proposed-amd64 ===
== install ==
[ 0.000000] Command line: url=http://192.168.1.131:9900//preseed foo_nocopy=1 priority=critical locale=en_US --- console=ttyS0 foo_copy=1
== boot ==
[stdout] Mon, 20 Jul 2015 13:10:41 -0400 cmdline: BOOT_IMAGE=/boot/vmlinuz-3.13.0-57-generic root=UUID=bbbdb4cf-1e2d-4384-ae79-80012eea8124 ro console=ttyS0 foo_copy=1 quiet
=== trusty-v-proposed-amd64 ===
== install ==
[ 0.000000] Command line: url=http://192.168.1.131:9900//preseed foo_nocopy=1 priority=critical locale=en_US --- console=ttyS0 foo_copy=1
== boot ==
[stdout] Mon, 20 Jul 2015 13:22:11 -0400 cmdline: BOOT_IMAGE=/boot/vmlinuz-3.13.0-57-generic root=UUID=2b5b64f9-2eaf-44ad-b892-1de31384ed5e ro console=ttyS0 foo_copy=1 quiet
=== utopic-proposed-amd64 ===
== install ==
[ 0.000000] Command line: url=http://192.168.1.131:9900//preseed foo_nocopy=1 priority=critical locale=en_US --- console=ttyS0 foo_copy=1
== boot ==
[stdout] Mon, 20 Jul 2015 13:37:18 -0400 cmdline: BOOT_IMAGE=/boot/vmlinuz-3.16.0-43-generic root=UUID=f28d04f6-162c-4987-bd57-4c5f42437ba7 ro console=ttyS0 foo_copy=1 quiet