After installing the system the -security pocket was enabled in
/etc/apt/apt.conf.d/50unattended-upgrades.
** Also affects: casper (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: casper (Ubuntu Xenial)
Status: New => Triaged
** Changed in: casper (Ubuntu Xenial)
Importance: Undecided => Medium
** Changed in: casper (Ubuntu Xenial)
Assignee: (unassigned) => Brian Murray (brian-murray)
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Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1619188
Title:
Unattended upgrades can break persistent live media
Status in casper package in Ubuntu:
Fix Released
Status in casper source package in Xenial:
Triaged
Status in casper source package in Yakkety:
Fix Released
Bug description:
Looking at the persistent live Ubuntu 16.04 LTS system - the Software
& Updates screen / Update - I notice, that Automatic updates is set to
'Download and install automatically'. This is bad in a persistent live
system.
After leaving the persistent live Ubuntu 16.04 LTS system running
overnight, I found that it had performed an automatic upgrade:
df revealed that the content in casper-rw had increased to 1.6 GiB.
It was a surprise that the persistent live system started an automatic
upgrade. This is not caused by the installer (mkusb), because the
files controlling those actions are not touched. Instead it is caused
by a change of the default action, when there are security updates.
And the survey indicates that this default setting is different
between the flavours and versions of Ubuntu. Lubuntu keeps the setting
'Display immediately', while the other tested flavours change it from
14.04 LTS to 16.04 LTS.
Until this is resolved, it is a good idea to disable unattended-
upgrades manually, but above all, to take regular backups, when you
use a persistent live system.
The survey is described in this link to the Ubuntu Forums:
https://ubuntuforums.org/showthread.php?t=2335669&p=13538805#post13538805
and it contains some screenshots illustrating the settings manager for
automatic updates for different versions and flavours of Ubuntu.
-o-
There are various scripts in the casper package that change things to
be more appropriate for the live environment. I suggest to change the
default for security updates to 'Display immediately', when the system
is running live and persistent live.
See also this link to Ask Ubuntu, the first report about this problem:
https://askubuntu.com/questions/817750/unattended-upgrades-broke-
persistent-live-media/817820#
-o-
Addendum: Things should continue to work if you leave a live Ubuntu
iso running for a day or two. Unattended upgrades cause problems for
all live systems, 'live-only' and 'persistent live'.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: casper 1.376
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CasperVersion: 1.376
CurrentDesktop: Unity
Date: Thu Sep 1 08:32:08 2016
LiveMediaBuild: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: casper
UpgradeStatus: No upgrade log present (probably fresh install)
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