Enabling DX11 causes no shadows, black deadlocked game, or flicking shadows

Questions & Answers
1

As per title; this is in deferred mode, tho Forward rendering exhibits the same issues.

Running fullscreen on an AMD Radeon 7900, I get this horrendeous flicky mess:

Unity DX11 Shadows completely broken - YouTube (windowed is fine)

Disabling DX11 gives perfect shadows. There are no artifacts within the editor.

Running on an Nvidia 780M gives no shadows at all. They just disappear.

Running on Radeon 6970 or Nvidia 540M gives a black screen with the words ‘development build’ in the bottom right. If I run windowed on either of these, it works fine; going fullscreen causes the game to show what appears to be one of the atlases from the game.

All the PCs have the latest drivers, and I’ve tried latest beta drives (given as this happens on both Nvidia and ATi, however, it’s not likely to be driver-related)

And just to be a pain, I’m supposed to be showing this at a charity event this weekend, so any help at all would be absolutely amazing.

TL;DR Enabling DX11 breaks all the shadows across a huge number of different video cards and computers.

2

After speaking with our graphics guru’s, it looks like Oculus and our DX11 renderer are not playing nice. Can you submit this as a bug and include a small project where this is reproducible.

3

Found a solution on how to force Nvidia Optimus drivers to correctly work in DX11.
First of all, assign a GFX processor tu use for your Player *in Nvidia control pannel.
Then, right click on a Player Icon, and choose “Program Compatibility troubleshooter”.
Start it from there with “Try suggested settings” *(or something like this) I’m using italian windows, so it could be that names aren-t thee same as in italian)
This will force a correct GFX selection with DX11.
Only problem is that you will have to do It on every start. It can’t be saved (and don’t save it).