Ubiquity consistently crashes in Ubuntu 20.04

Bug #1880263 reported by PJSingh5000 on 2020-05-23
This bug affects 1 person
Affects Status Importance Assigned to Milestone
ubiquity (Ubuntu)

Bug Description

It's not clear what the bug or issue is.
Attempting to install Ubuntu 20.04 on HP Spectre.

The only message I see on the command line is...
$ ubiquity
/usr/bin/ubiquity:74: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
  import imp

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15
ProcVersionSignature: Ubuntu 5.4.0-31.35-generic 5.4.34
Uname: Linux 5.4.0-31-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.445
Date: Fri May 22 23:23:08 2020
InstallCmdLine: BOOT_IMAGE=(loop)/casper/vmlinuz boot=casper acpi=off iso-scan/filename=/ubuntu.iso noprompt noeject
LiveMediaBuild: Ubuntu 20.04.0 2020.05.23 LTS "Custom Focal Fossa" (20200522)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

PJSingh5000 (pjsingh5000) wrote :
PJSingh5000 (pjsingh5000) wrote :

Ubiquity crashes when installation is almost finished.

PJSingh5000 (pjsingh5000) wrote :

When I try to re-run ubiquity, I get the error, ubi-partman failed with exit code 10.

Cubic PPA (cubic-wizard) wrote :

The issue was because the customized filesystem.squashfs was missing the /proc and /tmp directories.
Ubiquity expects these directories to be present, because they are not automatically created during the installation process.
Including empty /proc and /tmp (and /run) directories solved the problem.

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