The issue is on v4.13 HWE kernel, because that's the only one that is
actually useful at all on these laptops (for example the Intel 8265 wifi
is not supported by the old iwlwifi driver in v4.4).

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  Dell Latitude 5490/5590 BIOS update 1.1.9 causes black screen at boot

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Artful:
  Fix Committed
Status in linux source package in Bionic:
  Fix Committed

Bug description:
  == SRU Justification ==
  This bug causes a Dell Latitude 5490/5590 with BIOS update 1.1.9 to get a
  black screen at boot. Specifying 'nomodeset' on the kernel command line works
  around the problem.

  Intel resolved the problem in upstream commit a3520b8992e5.  This commit
  is now in mainline as of 4.17.rc2.  It has also been cc'd to upstream

  == Fix ==
  a3520b8992e5 ("drm/i915/bios: filter out invalid DDC pins from VBT child 

  == Regression Potential ==
  Low.  This commit was also cc'd to upstream stable, so it recieved
  additional upstream review.

  Description:    Ubuntu 16.04.4 LTS
  Release:        16.04

  Ubuntu 16.04.4 LTS was installed to some Dell Latitude 5490 & 5590
  laptops, originally running BIOS version 1.0.8. The install media and
  the installed OS was running linux-generic-hwe kernel 4.13.0.

  After upgrading BIOS to latest version 1.1.9, the kernel no longer
  boots: right after loading the i915 drm driver, the screen goes black,
  and the machine can only be reset or power cycled. This is true for
  both the installation media, and the OS instance previously installed
  to the disk and updated to the latest hwe kernel 4.13.0-38.

  Specifying 'nomodeset' on the kernel command line works around the
  problem by disabling the i915 drm driver functionality. In that case,
  several display driver function are obviously missing (eg GLX &

  The problem manifested itself even when using the drm upstream latest 
git-head version. A custom built kernel was used to provide logs for this 
upstream bug report:

  The upstream Intel developers provided a patch, which was successfully tested 
by both the original reporter and me.

  I backported this fix to ubuntu-xenial hwe git-head, and tested the
  result successfully. I'd like this fix to be added to the ubuntu-
  xenial linux-generic-hwe kernel.

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