Preseeding change needed for desktop auto-installations

[Colin Watson]

If you're auto-installing a desktop system using preseeding, then you
need to add the following preseed entry in Lucid:

  d-i base-installer/kernel/backports-modules string nouveau

This is because otherwise grub-pc ends up being installed before it's
supposed to be, and all hell breaks loose.  See
https://bugs.launchpad.net/bugs/526422 for the gory details.

With any luck we'll be able to arrange for something more automatic
before Lucid is released, but this should tide people over for the
meantime.

This applies only to installations including X.  Other installations
remain unchanged.

-- 
Colin Watson                                       [cjwatson at ubuntu.com]