Originally Posted by blujay
*ahem* It's real simple: Either use the nVidia installer, or the Debian packages, but not both! Get rid of one before you install the other!
Well this may help some people blujay, and that would be great, but I have symptoms similar to tht00 (the thread initiator) and this isn't the problem on my system. The black screen and lockup happened on my system with the ubuntu breezy nvidia debs before ever trying the nVidia installer, and still happens after fully removing the nVidia installer.