Annoying 30s bootup pause on EC2 with HVM "Timeout connecting to device"

[Joshua Eichorn]

When using EC2 hvm instances there is an annoying 30 second pause during boot. It gets pulled into the networking.service in a systemd-analyze blame.

```
[Mon Jan 18 22:33:03 2016] xenbus_probe_frontend: Waiting for devices to initialise: 25s...20s...15s...10s...5s...0s...

[Mon Jan 18 22:33:28 2016] xenbus_probe_frontend: Timeout connecting to device: device/vfb/0 (local state 3, remote state 1)
```

This seems to be the same issue as https://github.com/coreos/bugs/issues/208

X-CPC-Real-Bug: bug 1602466

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

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[Paul White (paulw2u)]

Refling against ubuntu-on-ec2

[Mathew Hodson (mhodson)]

The ubuntu-on-ec2 project doesn't seem to be active anymore.

[Robert C Jennings (rcj)]

Assigning to a milestone for review of the issue and technical solution.

[Dan Watkins (oddbloke)]

I believe that this pause has been addressed in the Ubuntu AMIs.