erhog: No hypnosis on me while i figth against Morvudd. Because of this i could not finish the second part of contract. Removing all his health and then just watcing his thying to hipnosis me. I try many times without contract too. No way to do this
There seems to be a different remedy for each build of this game. For some, if you get on Roach (your horse), you can kill Morvudd without him "blinding" you (cut-scene) and then running off, where you follow him.
For me (PC), the thing that worked is right before you get to Morvudd (behind the wall), change to Ciri by typing 'Ciri' (no 'quotes') in the debug console (~). After Ciri beats him down to less than 50% health, the game will automatically go into the cut-scene and Morvudd will run away (where you can follow and kill him any way you want). As soon as the cut-scene is through, type 'Geralt' (no 'quotes') into the the debug console to change back.
The key is to get Morvudd's health down to 25% to 50% health to activate the cut-scene.