[Bug 1861537] Re: installer crashes when it is "creating partitions" or "calculating files to skip copying"

[Chris Guiver]

The problem was your install media was corrupted, ie. either an
incorrect ISO was downloaded (md5sum or sda256sum wasn't performed to
check it's integrity), or the write to install media failed (thus it
wrote a corrupted or incorrect data) or the device was faulty and thus
didn't store the correct data on it.

The media you are installing to was not the problem, your installation
media where used to 'boot' was invalid which would have been detected
with this step
(https://help.ubuntu.com/community/Installation/CDIntegrityCheck where
CD is whatever installation media you use, be it hdd/ssd/thumb-drive/dvd
or CD).

The prior (ISO) checksum step ensures the CDIntegrityCheck step is valid
& not giving false-reports, but in my experience it's the write to media
that usually fails (esp. on thumb-drives).

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https://bugs.launchpad.net/bugs/1861537

Title:
  installer crashes when it is "creating partitions" or "calculating
  files to skip copying"

Status in ubiquity package in Ubuntu:
  Invalid

Bug description:
  I believe that the installer crashes at the points listed in the
  title, but I cannot be for sure. But those are the things that it is
  saying at the time it crashes.

  If it is not listed, I am trying to install to a single NVMe drive,
  and it is the only one. I am able to install Ubuntu (vanilla), but
  Xubuntu and Kubuntu and KDE Neon do this same exact thing, with the
  same exact error.

  Xubuntu 19.10

  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: ubiquity 19.10.21
  ProcVersionSignature: Ubuntu 5.3.0-18.19-generic 5.3.1
  Uname: Linux 5.3.0-18-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu8
  Architecture: amd64
  CasperVersion: 1.427
  Date: Fri Jan 31 19:09:49 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/xubuntu.seed quiet splash ---
  LiveMediaBuild: Xubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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