[Bug 1894589] [NEW] After grub updates the video display is wrong

[Gordon Uretsky]

Public bug reported:

After today's updates, including:
 grub-common:amd64 2.02-2ubuntu8.18
 grub-efi-amd64-bin:amd64 2.02-2ubuntu8.18
 grub-pc-bin:amd64 2.02-2ubuntu8.18
 grub2-common:amd64 2.02-2ubuntu8.18
 grub-pc:amd64 2.02-2ubuntu8.18
 grub-efi-amd64-signed:amd64 1.93.20+2.02-2ubuntu8.18

I was dual booting into Windows and back, so that I can say with
certainty that the bug started affecting me today when I came back into
Ubuntu.

I get the error "Failed to start Load Kernel Modules" and my video
monitor is restricted to "Unknown Display" 1024 x 768 but works
correctly otherwise.

On August 26 the kernel updated to 4.15.0-115 from 4.15.0-112 which
seemed to cause no problems.

I don't see any other likely suspects in today's upgrade, BUT it is
fixed by booting into the prior kernel version 4.15.0-112, leaving an
interplay between grub and the newer kernel as a likely culprit.

Description:	Ubuntu 18.04.5 LTS
Release:	18.04
grub2-common    Installed: 2.02-2ubuntu8.18
(etc as above)

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: grub2-common 2.02-2ubuntu8.18
ProcVersionSignature: Ubuntu 4.15.0-115.116-generic 4.15.18
Uname: Linux 4.15.0-115-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.17
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Sep  6 21:53:36 2020
InstallationDate: Installed on 2018-08-26 (742 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: grub2
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic

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https://bugs.launchpad.net/bugs/1894589

Title:
  After grub updates the video display is wrong

Status in grub2 package in Ubuntu:
  New

Bug description:
  After today's updates, including:
   grub-common:amd64 2.02-2ubuntu8.18
   grub-efi-amd64-bin:amd64 2.02-2ubuntu8.18
   grub-pc-bin:amd64 2.02-2ubuntu8.18
   grub2-common:amd64 2.02-2ubuntu8.18
   grub-pc:amd64 2.02-2ubuntu8.18
   grub-efi-amd64-signed:amd64 1.93.20+2.02-2ubuntu8.18

  I was dual booting into Windows and back, so that I can say with
  certainty that the bug started affecting me today when I came back
  into Ubuntu.

  I get the error "Failed to start Load Kernel Modules" and my video
  monitor is restricted to "Unknown Display" 1024 x 768 but works
  correctly otherwise.

  On August 26 the kernel updated to 4.15.0-115 from 4.15.0-112 which
  seemed to cause no problems.

  I don't see any other likely suspects in today's upgrade, BUT it is
  fixed by booting into the prior kernel version 4.15.0-112, leaving an
  interplay between grub and the newer kernel as a likely culprit.

  Description:	Ubuntu 18.04.5 LTS
  Release:	18.04
  grub2-common    Installed: 2.02-2ubuntu8.18
  (etc as above)

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: grub2-common 2.02-2ubuntu8.18
  ProcVersionSignature: Ubuntu 4.15.0-115.116-generic 4.15.18
  Uname: Linux 4.15.0-115-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.17
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Sep  6 21:53:36 2020
  InstallationDate: Installed on 2018-08-26 (742 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub2
  UpgradeStatus: No upgrade log present (probably fresh install)

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