God I know what you mean, let us know if you solve this one....my boyfriend is crap with getting up too, he used to set three alarms all to go off at the same time at 6am, which was distressing as all the alarms were down his side of the bed, and I just couldn't wake him up to turn them off. He'd quite happily have them all going off for 20 mins or more.
Most of the time he would ignore me and turn over. Sometimes he was disorientated and would say "I have turned them off" when all three were blaring away, which was intensely irritating!!
We used to end up having a blazing row about it most mornings, usually culminating in me starting to shout, or stomping round to his side of the bed to turn the buggers off. When he finally got up he'd be really pissed off, and jealous that I got an extra half an hour before my alarm went off for work.
Since I've come out of work I've put my foot down, stolen all his alarms, now use only one, and set it for half an hour later (I discovered he was getting up an hour earlier than necessary so he could play on his computer ffs!)
I now -for the sake of argument- talk to him and make him answer until I can tell he's actually responding, then get up with him, make him a coffee and do his lunch. Still a bit too much like being his Mum, I know, but for us it's a lot of progress after two years of arguments!
I don't think it's anything like sleep apneoa (sp?) he just plays on his laptop and eats sweets til after midnight. I have no idea what it's going to be like when baby arrives and I've been up half the night with it and he STILL can't wake up by himself.