This also affects 14.04 LTS, although to a slightly lesser degree. In
14.04 we have a patch which does the modprobing for the "cpu" subsystem;
but reportedly this also affects drivers of other platforms, so let's
just backport that more generic upstream fix to cover all cases.

This can potentially cause a lot more attempts to load nonexisting
modules, and thus affect boot speed a bit. For 14.04 we have a builtin
kmod which is really fast to fail, so the impact should be negligible.
It might be measurable on 12.04 on some systems, but then again as we do
ship backported kernels on 12.04 and officially support them we don't
have much choice here.

** Summary changed:

- [precise] udev does not automatically load modules with kernel >= 3.11
+ [precise, trusty] udev does not automatically load modules with kernel >= 3.11

** Also affects: systemd (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: udev (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Also affects: systemd (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** No longer affects: systemd (Ubuntu Precise)

** No longer affects: udev (Ubuntu Trusty)

** Changed in: systemd (Ubuntu)
       Status: New => Fix Released

** Changed in: systemd (Ubuntu Trusty)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1404509

Title:
  [precise, trusty] udev does not automatically load modules with kernel
  >= 3.11

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