[Bug 987726] Re: Unity doesn't start at all on a 3D capable machine instead of falling back to unity-2d as it should (because of lack of 16bit support in compiz).

[onanisland]

I am also experiencing issues when I went from 11.10 to 12.04 LTS. We
currently use fat-clients and I am getting just a wallpaper on new
accounts, the previous 11.10 accounts login just fine. I'm hoping this
will be fixed soon as this is a pretty big issue for me not being able
to add new user accounts at the moment.

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https://bugs.launchpad.net/bugs/987726

Title:
  Unity doesn't start at all on a 3D capable machine instead of falling
  back to unity-2d as it should (because of lack of 16bit support in
  compiz).

Status in “ldm” package in Ubuntu:
  Confirmed

Bug description:
  Generic bug so I remember to investigate this. Apparently on some
  systems the fallback doesn't happen as it should and people get an
  empty session instead of unity-2d.

  Manually selecting unity-2d works around the issue. I'll release note
  this bug and investigate when I get back home.

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