Honestly, I don't know. I usually don't go to the bars before an 11AM game. I do know that Blarney's is open with breakfast/bloody's/screwdrivers, etc. Prepare to be underwhelmed by any bar that serves breakfast, but they do have a good breakfast burrito called The Belch Burrito. I do think most should be open by 8 at the latest.
If you really want the U of M/Dinkytown/Minneapolis experience, get up super early and head into Al's Breakfast in Dinkytown. Opens at 6AM I believe and there will be a line to get in before it opens. Small place with like 8-10 counter stools and that's it, but they do up breakfast right. Prepare to wait, but if you're a morning person and up at 4:30-5, you should head over there.
I still can't recommend Campus Pizza enough. Great place after the game to let any traffic empty out. Plenty of TV's for you to catch the 2:30 games.