I picked up the Dragonborn DLC over the summer sale and figured I'd give it a go with a totally fresh install. Everything was going fine for a while. I went to Solstheim right after I was attacked by the cultists and didn't run into any major issues. I decided to leave after doing a couple quests so I could play through Falskaar.
I did about half the Falskaar questline, then went back to Skyrim to complete some side quests. Then I tried to go back to Solstheim. I used to fast travel method at first, and the game just hung on the loading screen for a few minutes until I alt tabbed out, at which point it stopped working and I had to close it. Same thing happened when I tried using the boat. After that, I deactivated everything except form Skyrim.esm, Update.esm, and Dragonborn.esm. I was able to travel to Solstheim without issue. I went back and activated Hearthfires.esm--still, no problems.
Now here's the interesting part:
I activated both Dawnguard.esm and Falskaar.esm. Instead of hanging the load screen, the game instantly crashed this time when I tried to travel to Solstheim. I went back and deactivated Falskaar and it instantly crashed again. Then I reactivated Falskaar and deactivated Dawnguard, and the same thing happened. So I deactivated both esm files, and reactivated every single mod in my load order that didn't have a dependency on either of them. And guess what--it worked. I could get to Solstheim with no problem.
The only thing Dawnguard and Falskaar really have in common is that they add new worldspaces to the game. I wonder if this could be causing the issue somehow. I've tried using the coc command to get there, and it does work, but only with interior cells. When I try to walk outside, the game hangs or crashes. It seems the problem is with the Solstheim worldspace, it seems.
Load Order:
- Skyrim.esm Active
- Update.esm Active
- Dawnguard.esm Active
- HearthFires.esm Active
- Dragonborn.esm Active
- Falskaar.esm Active
- HighResTexturePack01.esp Active
- HighResTexturePack02.esp Active
- HighResTexturePack03.esp Active
- Unofficial Skyrim Patch.esp Active
- Unofficial Dawnguard Patch.esp Active
- Unofficial Hearthfire Patch.esp Active
- Unofficial Dragonborn Patch.esp Active
- Unofficial High Resolution Patch.esp Active
- StaticMeshImprovementMod.esp Active
- StaticMeshImprovementMod-DragonbornTernFix.esp Active
- Dragon Soul Relinquishment.esp Active
- DYNAVISION Dynamic Depth of Field.esp Active
- RaceMenu.esp Active
- RaceMenuPlugin.esp Active
- SkyUI.esp Active
- DragonBoneEbonsteel.esp Active
- ASIS-Encounter Zones.esp Active
- DeadlyDragons.esp Active
- DeadlyMonsters.esp Active
- SkyHavenTempleEnhanced.esp Active
- Civil War Overhaul.esp
- Headtracking.esp Active
- Immersive Weapons.esp Active
- dD - Enhanced Blood Main.esp Active
- skyforgedWeapons.esp Active
- Helgen Reborn.esp Active
- Realistic Lighting Overhaul - Dungeons.esp Active
- Realistic Lighting Overhaul - Dawnguard Interiors.esp Active
- Realistic Lighting Overhaul - Major City Exteriors.esp Active
- Realistic Lighting Overhaul - Major City Interiors.esp Active
- Realistic Lighting Overhaul - Minor Cities and Town Interiors.esp Active
- EMCompViljaSkyrim.esp Active
- EMViljaInSolstheimAddOn.esp Active
- UFO - Ultimate Follower Overhaul.esp Active
- UFO - Dawnguard AddOn.esp Active
- UFO - Heartfire AddOn.esp Active
- dD - Realistic Ragdoll Force - Realistic.esp Active
- WATER.esp Active
- WATER Plants.esp Active
- WATER DB Waves.esp Active
- Bashed Patch, 0.esp Active
- ASIS-Dependency.esp Active
- ASIS.esp Active