I suspect this is because the Unity hardware detection (and subsequent fallback to software rendering) was removed from Compiz and added as a session startup script in Nux but the entire change has not made it through the distro landing process.
I'm going to suggest waiting a couple of days for the next Nux release into Saucy and test again. ** Changed in: unity (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1212821 Title: Unity fails to load on old hardware on Saucy To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1212821/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs