[Bug 1552539] Re: Ubiquity Erase Disk and Install Fails to create Swap Space

[Martin Pitt]

I managed to grab a journal with debugging enabled. This shows that a
change event for sda3 gets picked up which reactivates the dev-sda3.swap
unit and then calls swapon:

Apr 20 13:11:21 ubuntu systemd[1]: dev-sda3.device: Changed dead -> plugged
Apr 20 13:11:21 ubuntu systemd[1]: dev-sda3.swap: Trying to enqueue job dev-sda3.swap/start/fail
Apr 20 13:11:21 ubuntu systemd[1]: dev-sda3.swap: Installed new job dev-sda3.swap/start as 2745
Apr 20 13:11:21 ubuntu systemd[1]: dev-sda3.swap: Enqueued job dev-sda3.swap/start as 2745
Apr 20 13:11:21 ubuntu systemd[1]: dev-sda3.swap: About to execute: /sbin/swapon /dev/sda3

That swapon actually fails in this log because it's busy, but it
eventually succeeds.

So this answers *what* is calling swapon. It does not yet answer what
exactly happens in between the swapoff and mkswap calls, as doing just
those from a shell don't trigger this behaviour. I suppose some uevent
is generated in between which triggers the re-activation.

** Attachment added: "debug journal while this happens"
   https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1552539/+attachment/4640717/+files/journal.txt

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https://bugs.launchpad.net/bugs/1552539

Title:
  Ubiquity Erase Disk and Install Fails to create Swap Space

Status in Release Notes for Ubuntu:
  Fix Released
Status in casper package in Ubuntu:
  Fix Released
Status in ubiquity package in Ubuntu:
  Confirmed

Bug description:
  Daily Build of Gnome 16.04 using installation option to Erase Disk and Install fails with following message:
  "The creation of swap space in Partition #5 of SCSi3(0,0,0) (sda) failed.

  This is a Virtualbox based install using virtual disks that had a prior installation of a daily build.
  The installation process does not fail when I delete and recreate the Virtual Machine.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.47
  ProcVersionSignature: Ubuntu 4.4.0-9.24-generic 4.4.3
  Uname: Linux 4.4.0-9-generic x86_64
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  CasperVersion: 1.367
  Date: Thu Mar  3 04:26:59 2016
  ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
  InstallCmdLine: file=/cdrom/preseed/ubuntu-gnome.seed boot=casper initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity
  InterpreterPath: /usr/bin/python3.5
  LiveMediaBuild: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160302)
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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