Public bug reported:
Trying to do an unattended upgrade of Ubuntu 14.04 to 16.04 with:
sudo do-release-upgrade -f DistUpgradeViewNonInteractive
fails with the Python traceback:
Configuration file '/etc/default/rcS'
==> Modified (by you or by a script) since installation.
==> Package distributor has shipped an updated version.
What would you like to do about it ? Your options are:
Y or I : install the package maintainer's version
N or O : keep your currently-installed version
D : show the differences between the versions
Z : start a shell to examine the situation
The default action is to keep your current version.
*** rcS (Y/I/N/O/D/Z) [default=N] ? Error in sys.excepthook:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 63, in
apport_excepthook
from apport.fileutils import likely_packaged, get_recent_crashes
File "/usr/lib/python3/dist-packages/apport/__init__.py", line 5, in
<module>
from apport.report import Report
File "/usr/lib/python3/dist-packages/apport/report.py", line 15, in
<module>
import xml.dom, xml.dom.minidom
ImportError: No module named 'xml.dom'
Original exception was:
Traceback (most recent call last):
File "/tmp/ubuntu-release-upgrader-8dpb24f4/xenial", line 8, in <module>
sys.exit(main())
File
"/tmp/ubuntu-release-upgrader-8dpb24f4/DistUpgrade/DistUpgradeMain.py", line
242, in main
if app.run():
File
"/tmp/ubuntu-release-upgrader-8dpb24f4/DistUpgrade/DistUpgradeController.py",
line 1876, in run
return self.fullUpgrade()
File
"/tmp/ubuntu-release-upgrader-8dpb24f4/DistUpgrade/DistUpgradeController.py",
line 1841, in fullUpgrade
if not self.doDistUpgrade():
File
"/tmp/ubuntu-release-upgrader-8dpb24f4/DistUpgrade/DistUpgradeController.py",
line 1182, in doDistUpgrade
res = self.cache.commit(fprogress,iprogress)
File
"/tmp/ubuntu-release-upgrader-8dpb24f4/DistUpgrade/DistUpgradeCache.py", line
286, in commit
apt.Cache.commit(self, fprogress, iprogress)
File "/usr/lib/python3/dist-packages/apt/cache.py", line 501, in commit
# which is less than optimal!
File "/usr/lib/python3/dist-packages/apt/cache.py", line 465, in
install_archives
File
"/tmp/ubuntu-release-upgrader-8dpb24f4/DistUpgrade/DistUpgradeView.py", line
234, in run
res = os.WEXITSTATUS(self.wait_child())
File
"/tmp/ubuntu-release-upgrader-8dpb24f4/DistUpgrade/DistUpgradeView.py", line
200, in wait_child
self.update_interface()
File
"/tmp/ubuntu-release-upgrader-8dpb24f4/DistUpgrade/DistUpgradeViewNonInteractive.py",
line 221, in update_interface
os.write(self.master_fd,chr(3))
TypeError: 'str' does not support the buffer interface
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.21
ProcVersionSignature: Ubuntu 4.4.0-62.83-generic 4.4.40
Uname: Linux 4.4.0-62-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: GNOME
Date: Sat Feb 4 09:41:55 2017
InstallationDate: Installed on 2017-01-21 (13 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade xenial
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https://bugs.launchpad.net/bugs/1661849
Title:
Unattended do-release-upgrade fails with Python import error
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