[Bug 1892641] Re: After installing Ubuntu 20 from USB-drive, a black screen appears at startup

[Brian Murray]

*** This bug is a duplicate of bug 1798369 ***
    https://bugs.launchpad.net/bugs/1798369

** This bug has been marked a duplicate of bug 1798369
   Reinstall Ubuntu (with preserving existing data) shows error message due to "Could not get lock /target/var/cache/apt/archives/lock"

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https://bugs.launchpad.net/bugs/1892641

Title:
  After installing Ubuntu 20 from USB-drive, a black screen appears at
  startup

Status in ubiquity package in Ubuntu:
  New

Bug description:
  After installing Ubuntu 20 from USB-drive, a black screen appears at
  startup

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity 20.04.15.2 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
  Uname: Linux 5.4.0-42-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu27.4
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.445.1
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Aug 23 22:13:06 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  ProcEnviron:
   LANGUAGE=ru_RU.UTF-8
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=ru_RU.UTF-8
   LC_NUMERIC=C.UTF-8
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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