Blank Screen on SU Request?

[Setite]

I am getting a black screen with SU requests and I can't find an answer as to how to fix it. Did an app do this? Let me know.

EDIT: This is not when I open the Superuser app manually, but when an app request SU.
EDIT: Odd. My notification window said debugging was on, but somehow, it was not.

 

[imtravis]

Okay, so you figured out that you need USB debugging on..

I had the same issue, until I got lucky and figured it out..