KDE front-end crashes on start up - ubiqity-dm and live session

Bug #1805685 reported by Rik Mills on 2018-11-28
This bug affects 1 person
Affects Status Importance Assigned to Milestone
ubiquity (Ubuntu)
Nominated for Disco by Rik Mills

Bug Description

Version: 19.04.2
Release: Disco Dingo 19.04
Kubuntu live iso: 20181128

Crash occurs in ubiquity-dm, where a dialog reports an unecoverable error, and that a live session will be started.

Started ubiqity in the live session shows a segfault.

~$ ubiquity -d
/usr/bin/ubiquity:74: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
  import imp
Segmentation fault (core dumped)

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: ubiquity 19.04.2
ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
Uname: Linux 4.18.0-11-generic x86_64
ApportVersion: 2.20.10-0ubuntu14
Architecture: amd64
CasperVersion: 1.401
CurrentDesktop: KDE
Date: Wed Nov 28 18:38:47 2018
InstallCmdLine: file=/cdrom/preseed/kubuntu.seed boot=casper maybe-ubiquity initrd=/casper/initrd quiet splash --- maybe-ubiquity
LiveMediaBuild: Kubuntu 19.04 "Disco Dingo" - Alpha amd64 (20181128.1)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

Related branches

Rik Mills (rikmills) wrote :
Changed in ubiquity (Ubuntu):
importance: Undecided → High
Rik Mills (rikmills) wrote :

I believe we need to cherry pick this commit from KDE Neon's fork of ubiquity.


Manually applying that change to kde_ui.py in the live session allows ubiquity to start, and complete an install.

Rik Mills (rikmills) on 2018-11-29
Changed in ubiquity (Ubuntu):
importance: High → Critical
Ubuntu QA Website (ubuntuqa) wrote :

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:

tags: added: iso-testing
Rik Mills (rikmills) wrote :

Merge proposal in place to fix this. I would like to get this uploaded as soon, as Kubuntu daily iso is not installable until this is fixed.

Launchpad Janitor (janitor) wrote :

This bug was fixed in the package ubiquity -

ubiquity ( disco; urgency=medium

  * Automatic update of included source packages: shim-signed 1.39.

  [ Rik Mills ]
  * Cherry pick commit by Harald Sitter from KDE Neon's ubiquity fork.
    Fixes ubiquity crash with new Kcrash. (LP: #1805685)

 -- Steve Langasek <email address hidden> Fri, 07 Dec 2018 09:51:52 +0200

Changed in ubiquity (Ubuntu):
status: New → Fix Released
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