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[Bug 1104230] Re: DisplayPort 1.2 MST support is missing in the Intel driver


Thanks for giving that a try Vincent. I believe that the intel driver
needs to be reinstalled for this to work.

Regarding the source code:
Please not that if you uncomment the following line in your /etc/apt/sources.list.d/dgadomski-linux-mst-trusty.list file
# deb-src http://ppa.launchpad.net/dgadomski/linux-mst/ubuntu trusty main

it should allow you to get the kernel source with:
sudo apt-get update
apt-get source linux-image-3.16.0-19-generic

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  DisplayPort 1.2 MST support is missing in the Intel driver

Status in “xserver-xorg-video-intel” package in Ubuntu:

Bug description:
  I have two recent DisplayPort monitors, both supporting the 1.2
  version of the standard and one containing an MST hub (DELL 2913WM).

  I have an Intel Haswell based NUC connected over mini-displayport to
  the display containing the hub, then the second display is plugged in
  that one over DisplayPort.

  DisplayPort 1.2 is enabled on the display containing the hub and the
  second display lights up fine but just works as a clone of the first
  display, without ever showing up in xrandr, dmesg or any other useful
  logs I could find.

  My understanding of MST is that the second display should show up as
  DP2 on my laptop so I can configure it as I would any other display.

  UPDATE: Updated the bug report after it was pointed out that the
  original test hardware, a Lenovo x230 isn't DP 1.2 capable. The same
  test on hardware also fails, due to missing support for MST in the

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