*** This bug is a duplicate of bug 1813663 ***
    https://bugs.launchpad.net/bugs/1813663

I can confirm I'm having the same problem with a Dell Precision 5510
laptop.  I have traced the problem to the startup item "/usr/lib/x86_64
-linux-gnu/cinnamon-settings-daemon/csd-xrandr"   it seems xrandr is
freezing the system when it boots up connected to a Thunderbolt 3 Dock.

If I disable that startup item, I can boot up while docked just fine, I
just can't change my monitoring configuration around.  If I boot up
using the 4.15.0-43-generic kernel, that startup option works just fine
and everything works.

Somehow linux-image-4.15.0-44-generic  has changed how the video card
works with Dell laptops and Thunderbolt 3 docks; as soon as xrandr tries
to fully initialize the graphics cards everything freezes up.

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https://bugs.launchpad.net/bugs/1813742

Title:
  package linux-image-4.15.0-44-generic 4.15.0-44.47 failed to
  install/upgrade: installed linux-image-4.15.0-44-generic package pre-
  removal script subprocess returned error exit status 1

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Hi,

  After upgrading my Ubuntu 18.04 LTS to the new kernel 4.15.0-44 on my
  Dell Precision 5520, as soon as I connect the Dell Thunderbolt Dock
  TB16 the screen flickers, blanks and freezes... :-( I have to perform
  a "hard shutdown" (long press the power button) to halt.

  On previous kernel (4.15.0-43) the screen flickers 2 times but
  everything is good after that. For now, I have to hit Esc on startup
  to enter Grub and boot the this old kernel.

  Please give us a working kernel update... very soon ;-)

  Best regards,
  Manuel

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-44-generic 4.15.0-44.47
  ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
  Uname: Linux 4.15.0-43-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  gdm        1548 F.... pulseaudio
                        munier     2165 F.... pulseaudio
  Date: Tue Jan 29 10:07:29 2019
  ErrorMessage: installed linux-image-4.15.0-44-generic package pre-removal 
script subprocess returned error exit status 1
  HibernationDevice: RESUME=UUID=4b0737bf-9110-4fec-af29-50f518e905c8
  InstallationDate: Installed on 2018-09-05 (145 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
(20180725)
  MachineType: Dell Inc. Precision 5520
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-43-generic 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=1
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
  Python3Details: /usr/bin/python3.6, Python 3.6.7, python3-minimal, 
3.6.7-1~18.04
  PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 
2.7.15~rc1-1
  RelatedPackageVersions: grub-pc 2.02-2ubuntu8.9
  SourcePackage: linux
  Title: package linux-image-4.15.0-44-generic 4.15.0-44.47 failed to 
install/upgrade: installed linux-image-4.15.0-44-generic package pre-removal 
script subprocess returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/02/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.12.1
  dmi.board.name: 0R6JFH
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.12.1:bd10/02/2018:svnDellInc.:pnPrecision5520:pvr:rvnDellInc.:rn0R6JFH:rvrA00:cvnDellInc.:ct10:cvr:
  dmi.product.family: Precision
  dmi.product.name: Precision 5520
  dmi.sys.vendor: Dell Inc.

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