D3100 no signal display port cable

[markcolclough]

Hi

I have the D3100 running on a XPS13 machine, with a brand new Asus VG248QE screen.

All is well with DVI and HDMI, but with the Display Port cable, there is no signal. The screen just goes blank and then reverts back to HDMI.

By the way, the sharpness of the pixels really sucks in HDMI / DVI. Fonts and lines in Outlook, for example, are entirely missing, black fonts on the screen are coloured and pixelated.

Any suggestions on these two problems would be welcome.

Mark

[markcolclough]

Here's Dropbox link to the support files

https://www.dropbox.com/sh/gzq440yeq...wrrMhCFPa?dl=0