I need help figuring out how to get out of a quest loop. I'm almost 30 hours into this character and can't seem to figure out how to advance the main story line.

I'm trying to finish up the quest called "The Fallen". I am on the third task which is to get the Greybeards' help in negotiating a truce. I can't advance this quest until I talk to Ulfric Stormcloak. I also have quest called "Season Unending" which is related to "The Fallen" since this is the quest that has the tasks to talk to the two leaders (one of them being Ulfric). When this quest is active and I go to Ulfric, he says something along the lines of "Shouldn't you be in Korvanjun proving Galmar right or wrong". I haven't yet started the quest "The Jagged Crown" because when I try to do the first task (talk to Galmar) he says something along the lines of "getting Ulfric to talk to the Empire is a waste of time" and never mentions anything about "The Jagged Crown" quest. When I actually go to Korvanjun, Ralof is just standing there waiting to fight somebody and the entrance to Korvanjun is blocked by vines.

Any ideas on what to do next? I'm stuck and will be really disappointed if I have to revert to a previous save from who knows how many hours ago.

the jagged crown is part of the civil war questline nothing to do with the main quest i never had to negotiate a truce cause i did the civil war before i finished the main so idk about the rest

Bummer. It looks like I'm not the only one to run into this (known issue with workaround)... http://www.uesp.net/wiki/Skyrim:Season_Unending