I believe this is a duplicate of bug #990908 ('Won't honor "Do Nothing" when Lid is Closed'). As described in that bug, the computer suspends when the lid is closed even though you've selected "Do Nothing" in the power preferences.
I believe this is a duplicate of bug #990908 ('Won't honor "Do Nothing" when Lid is Closed'). As described in that bug, the computer suspends when the lid is closed even though you've selected "Do Nothing" in the power preferences.