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[Stephen Fenwick <stephen@xxxxxxxxxxxxxxxxxx>]

Update: On Ubuntu Desktop 15.04 with Wily kernel I installed linux-
image-extra as well, and was able to get a working system.

So it looks like the problem is an interaction between the Wily kernel
and something else that has changed in 15.10.

If there is a way to get useful logs from the hung boot process on the
upgraded 15.10 I'm happy to give that a go - just let me know what to
do.

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https://bugs.launchpad.net/bugs/1512995

Title:
  Desktop 15.10 live image doesn't boot

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  The Ubuntu Desktop 15.10 live image fails to boot from USB on an Intel
  NUC5PPYH (N3700 CPU - details here
  http://www.intel.com/content/www/us/en/nuc/nuc-kit-nuc5ppyh.html)

  During the normal boot process it hangs on the splash screen. Booting in console mode gives an error:
   - NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [systemd-udevd:1165]

  A photo of the console boot screen showing this error is here:
  https://www.dropbox.com/s/ax6j2dbedqpwbrb/IMG_20151104_213045.jpg?dl=0

  I am happy to follow instructions to get more detailed logging, but am
  not currently clear how to do this at this point in the boot process.

  Ubuntu Desktop 15.04 installs successfully.
  This bug is still present in Ubuntu Desktop 16.04 nightly

  The BIOS settings on this device include an option for "Operating
  System" with values "Windows 7", "Windows 8.x/10" and "Linux". Setting
  this to "Linux" enables Ubuntu to boot, and Windows 10 seems to run OK
  too. This provides a workaround for now but isn't completely
  satisfactory as Windows 10 is probably not supported on the device in
  this mode, and this may cause problems I haven't found yet.

  I would expect that 15.10 runs with the BIOS in "Windows" mode the
  same as 15.04.

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