I bought an external monitor, the Dell u2711 due to the res and wanting to get the most out of my laptop.
Initially I used a mini dp adapter with dvi, hdmi and dp on and it wouldn't work, kept staying in power saver mode so I bought a single cable with minidp on one end and dp on the other. Plugged it in and voila, it works. Then I checked the resolution and have two options. 720p or 1080p. I had more options using HDMI but I want 2560x1440. That's why I bought it. Can anyone help please?