When I open my smart cover the screen on my ipad2 sometimes opens dim and will time out after a few seconds. Other times when I wake up my ipad with the smart cover it is bright and does not time out. I do not understand why sometimes the screen when it is opened with the smart cover is dim and times out almost immediatley and other times there is no problem when the ipad2 is opened with the smart cover it is completely bright and ready for use. I was wondering if there is something wrong with the ipad2 or the smart cover?