Before i started the main questline i decided to do the companions guild quests, the thieves guild quests and the dark brotherhood guild then i was going to do the stormcloaks but when i got the quest to kill an ice wraith i decided to make a start on the main quests. Now im on the part were i need to get General Tullius and Ulfric Stormcloak to go too the peace council. Tullius was no problem but before ulfric would speak to me i need to do the ice wraith quest so i did that now when i come back ulfric wants me to help gulmer but the problem is whenever i try to talk to him it doesnt let me interact with him, when i try to speak to him he just keeps saying " i cant believe you convinced ulfric to the peace council, nothing but a waste of time". Is there a way to fix this? If not then im quitting skyrim, im level 25 and really dont want to go through it all again, so if anybody can help i would be really really grateful.
I ran into this same issue on 360. i saved right before killing the ice wraith, and just reloaded at that save point. I then killed the ice wraith, returned to Winterhold, and spoke to Ulfric. At first open dialogue wouldn't activate, but I continued trying over and over. Finally the option became available to ask him about the peace council. Hope this helps!
P.S. I also read somewhere that you can reload a save just before accepting the quest, but that would have been a long way back in time for me. Now I have a strategy for game saves.