X thinks it is up, but screen is black?

[Tom Horsley]

On Sat, 5 Jul 2014 12:59:32 -0400
Tom Horsley wrote:

> (I'm off to try stuff like a different cable
> in the hope that it is something dumb).

Well, there is nothing wrong with any of the
hardware. I can get full UHD resolution
with Windows 7 and the nvidia drivers,
so it is now officially a research project
for linux :-(.