I built a Xenial test kernel with commit 
9a86cda07af2c63649932f0a4fc757701ef54c42.  The test kernel can be downloaded 
from:
http://kernel.ubuntu.com/~jsalisbury/lp1770423
Can you test this kernel and see if it resolves this bug?

Note about installing test kernels:
• If the test kernel is prior to 4.15(Bionic) you need to install the 
linux-image and linux-image-extra .deb packages.
• If the test kernel is 4.15(Bionic) or newer, you need to install the 
linux-modules, linux-modules-extra and linux-image-unsigned .deb packages.

Thanks in advance!

** Changed in: linux (Ubuntu Xenial)
     Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu Xenial)
       Status: Triaged => In Progress

** Changed in: linux (Ubuntu)
       Status: Triaged => In Progress

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https://bugs.launchpad.net/bugs/1770423

Title:
  Please cherry-pick upstream patch for HDMI on Dell XPS 9360

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  Connecting the Dell USB-C HDMI/LAN/VGA/USB adapter to my XPS 9360
  doesn’t quite work: I could not get my monitor to display a picture at
  all, regardless of which resolution I tried.

  A quick search on the internet revealed this patch:
  https://lists.freedesktop.org/archives/intel-
  gfx/2017-March/124077.html. Applying it to the 4.4.0-122 kernel does
  indeed make the HDMI work

  Could you please cherry-pick this patch into the Ubuntu kernel?
  Thanks!

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