Comment 20 for bug 1268771

Optimus machines: black screen with ubuntu drum login sound.
drivers work with 3.12-7 kernel

3.13-0 and 3.13-1 - black screen, ubuntu login sounds, tried every config file in the world. Also switching back from kernel 3.13 to 3.12 makes the video unrecoverable as if booting in 3.13. Some .conf I am unaware of being written to in 3.13 that breaks all working kernels nvidia video?

Assuming nvidia not sending to intel to display on screen in 3.13 variations.