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RE: Latitude E7440 black screen after undock

I installed A12 driver as well, seems to be same driver version when looking in Windows 7.

This is big issue for me, I can't present  smoothly when visiting clients.

Right when i plug in projector or boardroom TV into video port my screen goes black.

I cant toggle between between "extend" or "projector only" as screen is black.

If I unplug external monitor cable, I still cant get my display back on my laptop.

Only solution is hard reboot, which does not look good when you only have so much time in front of customer.

Any other ideas?  thanks!

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