Hello, I am replaced my old, and still overheating, Latitude E6400 by new E5440, but I am found that my two external displays can be set properly now.
I am using two displays Dell E2210 connected to Dell port replicator PR02X via DVI.
This was working fine with old E6400 running Kubuntu 12.04 LTS, and I was able set displays in any manner - I was using one desktop spread through both displays mostly. But now on E5440 with Kubuntu 14.04 LTS system see both displays as one, I can't set anything regarding displays, and see the same content on both displays.
I am tried connect one display via D-SUB (VGA) or DP ports on port replicator, but result is still the same (VGA port on laptops body is not working at all. HDMI on laptops body was not tested because I am missing HDMI to DVI adapter).
Situation is the same regardless if Intel or nVidia is set as master graphic card.
According to http://www.ubuntu.com/certification/hardware/201307-13941/should be E5440 fully supported by Ubuntu and Dell (except <ADMIN NOTE: Profanity removed as per TOU>nVidia Optimus), and this was reason why I am choose this model, so I hope that somebody will help me solve this issue.
Note1: My colleagues laptop which is exactly the same, but with Win 7 is working properly in my port replicator.
Note2: KScreen tool for settings displays in KDE desktop see my external displays as one device on port DP1, and laptops own display as eDP1.