After the dragon Durnehviir gives me his name (the shout to call him) I tried it when I left the soul cairn but it does not work. I only get the first word out, then a red cursor and the shout aborts. All the words are activeated. Can anyone shed some light? Thanks

I am on PC

Aim at a large open space on the ground

Treat Summon Durnehvir as you would a summoned atronach. Not sure if the summoner perk applies. Anyone know?

I was having the same issue (but on the 360), turns out that I needed to find a large open area, like out in the fields around Whiterun, and nearly point at the ground when I summon him. Only then will he pop up and speaks to you, or go about his "business".

Thanks. That must be it. I was not aiming it anywhere in particular.

Also aim close by. Like summoning an atronach it must be close.