Great Regan:

The last couple lines from the video until blank screen:
[OK] Started Light Display Manager.
     Starting WPA Supplicant...

taking this along with the boot up history didn't confirm the root cause
for me.

Despite this, as per your Bug Description, you noted this problem
started happening after an update. Could you please advise to which one
specifically?

** Attachment removed: "recording of boot without workaround"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1743797/+attachment/5052209/+files/Bug%201743797%20boot%20log%20trim.mov

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https://bugs.launchpad.net/bugs/1743797

Title:
  [HP Compaq nc6400] Blank screen on boot

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  A few months after upgrading to Ubuntu 16.04, I got a black screen
  after booting.

  WORKAROUND: Use kernel parameter:
  radeon.modeset=0

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: xorg 1:7.7+13ubuntu3
  ProcVersionSignature: Ubuntu 4.4.0-104.127-generic 4.4.98
  Uname: Linux 4.4.0-104-generic x86_64
  .tmp.unity_support_test.1:

  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  Date: Wed Jan 17 10:15:32 2018
  DistUpgraded: Fresh install
  DistroCodename: xenial
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] RV515/M52 [Mobility Radeon X1300] 
[1002:714a] (prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company RV515/M52 [Mobility Radeon X1300] 
[103c:30ac]
  InstallationDate: Installed on 2014-04-10 (1378 days ago)
  InstallationMedia: Ubuntu 12.04.4 LTS "Precise Pangolin" - Release amd64 
(20140204)
  MachineType: Hewlett-Packard HP Compaq nc6400 (RB523UA#ABA)
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcEnviron:
   LANGUAGE=en_CA:en
   PATH=(custom, no user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-104-generic 
root=UUID=123f436f-0331-4097-8a8e-54cc927298c4 ro radeon.modeset=0
  Renderer: Software
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/18/2006
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 68YCD Ver. F.08
  dmi.board.name: 30AC
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 56.34
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: 
dmi:bvnHewlett-Packard:bvr68YCDVer.F.08:bd12/18/2006:svnHewlett-Packard:pnHPCompaqnc6400(RB523UA#ABA):pvrF.08:rvnHewlett-Packard:rn30AC:rvrKBCVersion56.34:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP Compaq nc6400 (RB523UA#ABA)
  dmi.product.version: F.08
  dmi.sys.vendor: Hewlett-Packard
  version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.83-1~16.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.4-0ubuntu1~16.04.2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.4-0ubuntu1~16.04.2
  version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.7
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20160325-1ubuntu1.2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.12-1build2
  xserver.bootTime: Wed Jan 17 08:23:08 2018
  xserver.configfile: default
  xserver.errors:
   open /dev/dri/card0: No such file or directory
   open /dev/dri/card0: No such file or directory
   Screen 0 deleted because of no matching config section.
   Screen 0 deleted because of no matching config section.
   AIGLX: reverting to software rendering
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:

  xserver.version: 2:1.18.4-0ubuntu0.7

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