[Bug 1795249] Re: upgrade from 16. to UBUNTU 18.04 successful until restart now - then failed to boot up.

[Geoffrey Woodman]

It looks like the necessity for acpi=off in my grub file has now been
removed presumably by a recent update. My computer now boots up and
powers off on shutdown correctly. I am happy now. (I even got my scanner
working again!)

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https://bugs.launchpad.net/bugs/1795249

Title:
  upgrade from 16. to UBUNTU 18.04 successful until restart now - then
  failed to boot up.

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  Upgrade from 16. (LTS) to UBUNTU 18.04 successful until restart now - then failed to boot up. acpi=off allows me to boot up. The 5 blobs on the splash screen were then permanent so switched off as: 
  sudo nano /etc/default/grub
  GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi=off"
  CTRL X, Y, Enter
  sudo update-grub

  I still have a problem that my SAMSUNG monitor is "unknown" and I
  don't know how to overcome this. It is now in a very strange aspect
  ratio.

  Not expecting these types of problems on an upgrade!!! It took hours
  of effort to work out how to get the computer to start up before I
  could edit the above file. I would have been completely stuck without
  access to an old Windows machine!!!

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.25
  ProcVersionSignature: Ubuntu 4.15.0-34.37-generic 4.15.18
  Uname: Linux 4.15.0-34-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.3
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Sep 30 17:02:03 2018
  InstallationDate: Installed on 2010-09-15 (2937 days ago)
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
  PackageArchitecture: all
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  Symptom: dist-upgrade
  UpgradeStatus: Upgraded to bionic on 2018-09-27 (3 days ago)
  VarLogDistupgradeTermlog:

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