[Bug 1926233] Re: Black screen after upgrade 20.04 -> 20.10

[Simon Cornish]

Gonna go out on a limb and guess this is a video problem so here is the output of lshw -c video
  *-display                 
       description: VGA compatible controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 2
       bus info: pci at 0000:00:02.0
       version: 04
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:151 memory:d3000000-d3ffffff memory:30000000-3fffffff ioport:4000(size=64) memory:c0000-dffff
  *-display
       description: 3D controller
       product: TU117M [GeForce GTX 1650 Mobile / Max-Q]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci at 0000:02:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list rom
       configuration: driver=nouveau latency=0
       resources: irq:150 memory:d4000000-d4ffffff memory:90000000-9fffffff memory:a0000000-a1ffffff ioport:3000(size=128) memory:d5000000-d507ffff

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https://bugs.launchpad.net/bugs/1926233

Title:
  Black screen after upgrade 20.04 -> 20.10

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

Bug description:
  Installed 20.04.2 LTS,changed the updater settings and upgraded to 20.10
  After boot GRUB is presented as normal
  When selecting the default Ubuntu (or waiting the timeout) then blank screen occurs
  Backlight is on but the boot does not proceed
  I have tried editing the command line with combinations of acpi=off and/or nomodeset without effect.
  Also, even if I remove spash & quiet there is still no output at all.

  This bug was filed from a clean, updated 20.04 LTS because once I did
  the upgrade there was no system available to report the bug from.

  Here is something else: I tried the 20.10 and 21.04 desktop installers
  (from USB stick) and the behaviour is exactly the same - get to GRUB,
  select either Ubuntu or Ubuntu (safe graphics) and then just the black
  screen.

  I tried the 20.10 server and that could proceed to the text-based
  installation.

  Obviously the desired outcome in either the upgrade or installer
  scenario is that the system boots in a usable manner!

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.30
  ProcVersionSignature: Ubuntu 5.8.0-50.56~20.04.1-generic 5.8.18
  Uname: Linux 5.8.0-50-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.16
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Apr 26 17:45:36 2021
  InstallationDate: Installed on 2021-04-27 (0 days ago)
  InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  Symptom: dist-upgrade
  UpgradeStatus: No upgrade log present (probably fresh install)

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