Public bug reported:

adding nomodeset to grub parameter negates the problem, not 100% but
almost sure this has to do with graphics initialization.

first appeared after a recent upgrade

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu7.1
ProcVersionSignature: Ubuntu 4.15.0-70.79-generic 4.15.18
Uname: Linux 4.15.0-70-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sun Nov 24 13:42:39 2019
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
DkmsStatus:
 bcmwl, 6.30.223.271+bdcom, 4.15.0-66-generic, x86_64: installed
 bcmwl, 6.30.223.271+bdcom, 4.15.0-70-generic, x86_64: installed
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] 
(rev 18) (prog-if 00 [VGA controller])
   Subsystem: Dell Core Processor Integrated Graphics Controller [1028:0457]
InstallationDate: Installed on 2018-08-22 (458 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: Dell Inc. Inspiron N7010
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-70-generic 
root=UUID=5dd50c10-bb05-48da-af7d-ad4ca2d73eef ro quiet splash 
acpi_backlight=video vt.handoff=1
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/31/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A11
dmi.board.name: 08VFX1
dmi.board.vendor: Dell Inc.
dmi.board.version: A11
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A11
dmi.modalias: 
dmi:bvnDellInc.:bvrA11:bd03/31/2011:svnDellInc.:pnInspironN7010:pvrA11:rvnDellInc.:rn08VFX1:rvrA11:cvnDellInc.:ct8:cvrA11:
dmi.product.name: Inspiron N7010
dmi.product.version: A11
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.97-1ubuntu1~18.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 19.0.8-0ubuntu0~18.04.3
version.libgl1-mesa-glx: libgl1-mesa-glx 19.0.8-0ubuntu0~18.04.3
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic ubuntu

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https://bugs.launchpad.net/bugs/1853741

Title:
  system freezes randomly on boot, after loading initial ramdisk

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