[Bug 80187] New: Second external DisplayPort monitor not recognized: "DP2 disconnected"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80187

          Priority: medium
            Bug ID: 80187
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: Second external DisplayPort monitor not recognized:
                    "DP2 disconnected"
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: steffen.weber at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Notebook: HP EliteBook 840 G1 (Core i7-4600U, HD Graphics 4000)
Docking station: HP UltraSlim Dock 2013
Monitors: 2x Dell U2414H (1920x1080, DisplayPort)
Software: Linux 3.15.1, X.Org 1.15.99.903, xf86-video-intel 2.99.912

The docking station has two DisplayPort connectors. Both are connected to an
external Dell U2414H monitor. But GNOME and xrandr only see DP1 but not DP2.
(And for some reason the first external monitor is mirrored on the second
external monitor.)

# xrandr 
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected (normal left inverted right x axis y axis)
    [...]
DP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis)
527mm x 296mm
    [...]
HDMI1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

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