[Bug 1468091] Re: Ubuntu 15.10 Alpha-1 candidates do not boot in EC2

[Ben Howard]

Actually, PV and HVM instances are both affected. I narrowed it down to
udev; installing all updates except for udev results in a bootable
instance.

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https://bugs.launchpad.net/bugs/1468091

Title:
  Ubuntu 15.10 Alpha-1 candidates do not boot in EC2

Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu 15.10 Alpha-1 Candidates are not booting in EC2.  Instances are dropping to
   - Boot args (cat /proc/cmdline)
     - Check rootdelay= (did the system wait long enough?)
     - Check root= (did the system wait for the right device?)
   - Missing modules (cat /proc/modules; ls /dev)
  ALERT!  /dev/disk/by-uuid/e420d299-69ee-46eb-a1a4-893b54ab89a7 does not exist.  Dropping to a shell!

  This is happening on all instances and whether disks are mounted by
  label or UUID.

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