Board Thread:General Discussion/@comment-76.115.212.30-20130412225428/@comment-6881629-20151227103241

Try walking from Whiterun stables to Jorrvaskr, passing though the Whiterun main gate when you return seems to be a trigger for the quest to progress so if you fast traveled instead it can get missed. If the quest looks like the game thinks it's finished though you might need to reload a save when it was still ongoing.