Leviathan DLC Dr. Bryson's Lab freeze workaround
I am re-posting this solution to make it easier to find than in the middle of a thread. Hopefully this can help some people! Original post: here
Well, I have found a possible (partial) solution. (EA, please let me know if this is acceptable and allowed, because I wasn't sure!)
!!Seeing as EA allows you to use console commands and tweaks in the single player (editing anything that effects multiplayer is NOT allowed!!)!! , you can use the console to load the second (and other) map(s) of the Leviathan DLC (the asteroid mission etc). This means you completely bypass the lab part, and go straight to the next section.
The problem seems to be only at the lab.
Of course this solution means you miss out on the lab parts, which means most of the actual story/lore stuff.
To get this to work, you will have to activate the command console, and use a console command.
More information on how to activate the console is here: http://masseffect.wikia.com/wiki/PC_Tweaks_%28Mass_Effect_3%29#Enabling_game_console
The command in question is the "at" command. You use this to load the level.
The map commands for the Leviathan DLC are this (found in the command list, which you can also find through the link above):
Biop_Lev001 (Citadel: Dr. Bryson's Lab)
Biop_Lev002 (Mahavid: T-GES Mineral Works)
Biop_Lev003 (Namakli: Dig site)
Biop_Lev004 (2181 Despoina: Shipwreck)
So your command to load the asteroid level would be "at Biop_Lev002"
This starts the cutscene and the mission.
Hopefully this helps people to still enjoy (some) of the DLC.
EDIT: The missions seem to work okay, but since they make you go back to the lab after each, you have to manually load the next mission yourself with the console command while you're on the Normandy (after each mission). A.K.A you're just missing out on the lab parts. (Unfortunate, but at least the rest is playable)
Important!!!
Before you manually start the last mission on Despoina, make sure you are on the Normandy! Because:
After finishing the last mission I found myself on the Normandy with all the crew missing (except EDI for some reason), this is a bug, because you're supposed to debrief with Admiral Hackett. Simply go to the command center and it should fix itself.
I'm unsure if you end up back on the Normandy by default or because that's where I manually started the missions from (I'm guessing the latter), but since it doesn't automatically go to the debrief, it's best you're on the Normandy to 'glitch' yourself back into the proper sequence.
Also, the war assets got updated when I accessed the war assets terminal.
You will also find that even after finishing, you will still have both the notifications for needing to go to the lab still stuck on the citadel (on the star map), you can just ignore this, as there is no option to go there anymore.