[Bug 1906084] [NEW] Ubuntu 20.04 desktop installation crashes

[Irina Belova]

Public bug reported:

I choose manual modification for disk partitions ("Something else" button) and got installation crash.
Root (/) - on /dev/sda2, Var (/var) - on lvm.

Last messages from /var/log/syslog:

Nov 28 03:56:02 ubuntu ubiquity[6069]: Reverting lockdown of the desktop environment.
Nov 28 03:56:04 ubuntu /install.py: Exception during installation:
Nov 28 03:56:04 ubuntu /install.py: Traceback (most recent call last):
Nov 28 03:56:04 ubuntu /install.py:   File "/usr/share/ubiquity/install.py", line 764, in <module>
Nov 28 03:56:04 ubuntu /install.py:     install.run()
Nov 28 03:56:04 ubuntu /install.py:   File "/usr/share/ubiquity/install.py", line 135, in run
Nov 28 03:56:04 ubuntu /install.py:     self.copy_all()
Nov 28 03:56:04 ubuntu /install.py:   File "/usr/share/ubiquity/install.py", line 512, in copy_all
Nov 28 03:56:04 ubuntu /install.py:     self.db.progress('SET', 10 + copy_progress)
Nov 28 03:56:04 ubuntu /install.py:   File "/usr/lib/python3/dist-packages/debconf.py", line 83, in <lambda>
Nov 28 03:56:04 ubuntu /install.py:     lambda *args, **kw: self.command(command, *args, **kw))
Nov 28 03:56:04 ubuntu /install.py:   File "/usr/lib/python3/dist-packages/debconf.py", line 88, in command
Nov 28 03:56:04 ubuntu /install.py:     self.write.flush()
Nov 28 03:56:04 ubuntu /install.py: BrokenPipeError: [Errno 32] Broken pipe
Nov 28 03:56:04 ubuntu /install.py: 
 


Ubuntu version:
# lsb_release -rd
Description:	Ubuntu 20.04.1 LTS
Release:	20.04

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15.2
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
Date: Sat Nov 28 08:54:50 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)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 focal ubiquity-20.04.15.2 ubuntu

** Attachment added: "/var/log/syslog and /var/log/partman are in this file"
   https://bugs.launchpad.net/bugs/1906084/+attachment/5438893/+files/log.tgz

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https://bugs.launchpad.net/bugs/1906084

Title:
  Ubuntu 20.04 desktop installation crashes

Status in ubiquity package in Ubuntu:
  New

Bug description:
  I choose manual modification for disk partitions ("Something else" button) and got installation crash.
  Root (/) - on /dev/sda2, Var (/var) - on lvm.

  Last messages from /var/log/syslog:

  Nov 28 03:56:02 ubuntu ubiquity[6069]: Reverting lockdown of the desktop environment.
  Nov 28 03:56:04 ubuntu /install.py: Exception during installation:
  Nov 28 03:56:04 ubuntu /install.py: Traceback (most recent call last):
  Nov 28 03:56:04 ubuntu /install.py:   File "/usr/share/ubiquity/install.py", line 764, in <module>
  Nov 28 03:56:04 ubuntu /install.py:     install.run()
  Nov 28 03:56:04 ubuntu /install.py:   File "/usr/share/ubiquity/install.py", line 135, in run
  Nov 28 03:56:04 ubuntu /install.py:     self.copy_all()
  Nov 28 03:56:04 ubuntu /install.py:   File "/usr/share/ubiquity/install.py", line 512, in copy_all
  Nov 28 03:56:04 ubuntu /install.py:     self.db.progress('SET', 10 + copy_progress)
  Nov 28 03:56:04 ubuntu /install.py:   File "/usr/lib/python3/dist-packages/debconf.py", line 83, in <lambda>
  Nov 28 03:56:04 ubuntu /install.py:     lambda *args, **kw: self.command(command, *args, **kw))
  Nov 28 03:56:04 ubuntu /install.py:   File "/usr/lib/python3/dist-packages/debconf.py", line 88, in command
  Nov 28 03:56:04 ubuntu /install.py:     self.write.flush()
  Nov 28 03:56:04 ubuntu /install.py: BrokenPipeError: [Errno 32] Broken pipe
  Nov 28 03:56:04 ubuntu /install.py: 
   

  
  Ubuntu version:
  # lsb_release -rd
  Description:	Ubuntu 20.04.1 LTS
  Release:	20.04

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity 20.04.15.2
  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
  Date: Sat Nov 28 08:54:50 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)
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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