e7440 Latitude / Dell Dock Fails to detect extra Display ports

Bug #1686333 reported by Rostislav on 2017-04-26
This bug affects 1 person
Affects Status Importance Assigned to Milestone
xserver-xorg-video-intel (Ubuntu)

Bug Description

e7440 Latitude / Dell Dock

Description: Ubuntu 16.04.2 LTS
Release: 16.04

xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1.2

The docking station maps DP1 port of the laptop to two outputs at the back panel mirroring the picture.

Earlier (in 14.04) it used to be two separate outputs DP2 and DP3, which could not work at the same time with eDP(laptop screen) or DP1(laptop's port).

The problem is very similar to described here:

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