[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).

[Stéphane Graber]

Well, to be accurate, the fallback actually happens but it seems dependent on the hardware and not always happening.
My test hardware for non-3D stuff is a kvm virtual machine using the cirrus virtual graphic card and at least for this one, if I select Ubuntu I get redirected to an Ubuntu 2D session just fine. That's mostly why I didn't catch this earlier.

My guess is that something in nux's graphic capability check is failing
causing some hardware (if not most) to be considered as ok for Ubuntu
when it's really not (if only because compiz fails in 16bit mode). I'm
hoping to get a fix in nux instead of LTSP as people tend to update
their application server a lot more than they do their chroot.

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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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