[Bug 1897173] [NEW] 20.10 Installer crashes with partitions being written but unable to inform kernel of the change

[Bill (franksmcb)]

Public bug reported:

Ubuntu MATE currently daily 20.10 20200924 using QEMU.

Expected outcome:
Boot daily iso
Choose Erase disk and install Ubuntu MATE
Complete installation.

Actual outcome:
Boot daily iso
Choose Erase disk and install Ubuntu MATE
Install crashes with ERROR!!! (as superuser) Partition(s) on /dev/vda have been written, but we have been unable to inform the kernel of the change, probably because it/they are in use. As a result, the old partition(s) will remain in use. You should reboot now before making further changes.

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: ubiquity 20.10.10
ProcVersionSignature: Ubuntu 5.8.0-19.20-generic 5.8.8
Uname: Linux 5.8.0-19-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu47
Architecture: amd64
CasperMD5CheckMismatches: ./casper/filesystem.squashfs
CasperMD5CheckResult: skip
CasperVersion: 1.452
CurrentDesktop: MATE
Date: Thu Sep 24 19:29:19 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu-mate.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu-MATE 20.10 "Groovy Gorilla" - Alpha amd64 (20200924)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug groovy ubiquity-20.10.10 ubuntu-mate

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https://bugs.launchpad.net/bugs/1897173

Title:
  20.10 Installer crashes with partitions being written but unable to
  inform kernel of the change

Status in ubiquity package in Ubuntu:
  New

Bug description:
  Ubuntu MATE currently daily 20.10 20200924 using QEMU.

  Expected outcome:
  Boot daily iso
  Choose Erase disk and install Ubuntu MATE
  Complete installation.

  Actual outcome:
  Boot daily iso
  Choose Erase disk and install Ubuntu MATE
  Install crashes with ERROR!!! (as superuser) Partition(s) on /dev/vda have been written, but we have been unable to inform the kernel of the change, probably because it/they are in use. As a result, the old partition(s) will remain in use. You should reboot now before making further changes.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.10
  Package: ubiquity 20.10.10
  ProcVersionSignature: Ubuntu 5.8.0-19.20-generic 5.8.8
  Uname: Linux 5.8.0-19-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu47
  Architecture: amd64
  CasperMD5CheckMismatches: ./casper/filesystem.squashfs
  CasperMD5CheckResult: skip
  CasperVersion: 1.452
  CurrentDesktop: MATE
  Date: Thu Sep 24 19:29:19 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu-mate.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu-MATE 20.10 "Groovy Gorilla" - Alpha amd64 (20200924)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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