I have Lenovo E545 laptop. It has VGA & HDMI video outputs. AMD Radeon HD 8450G Graphics
Display: HP ZR2740W It has DVI-D and DisplayPort inputs.
First I bought following cable: http://www.amazon.com/gp/product/B004C9P9TM/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1
Didn't work, then I realized it's not bi-directional.
So, I bought this cable: http://www.amazon.com/gp/product/B004CBDY42/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1 High speed, dual link, 4k, etc.
Now it works. Laptop properly shows display model. But it only allows for maximum of 1280x720 resolution. It's not in "dual" or "extended" mode. Straight "projector" mode.
How do I make this laptop drive display at full 2560x1440 resolution?
I suspect it can't (but can't find definite specs) but little upset because my 3yo W510 does it no poroblem (via Display Port) and so is my little X230 (with Display Port)..