In the current development version of Ubuntu (13.10 Saucy) the power settings do offer a choice "When the lid is closed: Do nothing". So I'm marking this as fixed. (The behavior is broken, but that's a different issue; see bug #990908.)
In the current development version of Ubuntu (13.10 Saucy) the power settings do offer a choice "When the lid is closed: Do nothing". So I'm marking this as fixed. (The behavior is broken, but that's a different issue; see bug #990908.)