installation of 11.04 beta 1 fails while setting up basesystem

[oli z]

Binary package hint: ubiquity

when trying to install ubuntu 11.04 beta 1 desktop amd64 on a virtualbox image the installation fails

a window pops up saying:
Ein Fehler trat beim Installieren von Paketen auf:

E:Sub-process /usr/bin/dpkg returned an error code (1)

Die folgenden Pakete sind defekt:

Der Fehler kann durch die Verwendung eines veralteten Installationsprogramms auftreten oder von den obigen Paketen verursacht worden sein. Näheres finden Sie in der Protokolldatei »/var/log/syslog«. Die Installation wird fortgesetzt, kann aber zu einem späteren Zeitpunkt scheitern. Möglicherweise können dann nicht alle erforderlichen Pakete installiert oder entfernt werden. Sie sollten überprüfen, ob eine neuere Version des Installationsprogramms vorliegt oder den Fehler dem Hersteller melden.

Ein Fehler trat beim Installieren von Paketen auf:

cat /var/log/syslog -> related parts:
Apr 3 15:34:31 ubuntu ubiquity: Fehler traten auf beim Bearbeiten von:
Apr 3 15:34:31 ubuntu ubiquity: flashplugin-installer
Apr 3 15:34:31 ubuntu plugininstall.py: Traceback (most recent call last):
Apr 3 15:34:31 ubuntu plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 739, in do_install
Apr 3 15:34:31 ubuntu plugininstall.py: if not cache.commit(fetchprogress, installprogress):
Apr 3 15:34:31 ubuntu plugininstall.py: File "/usr/lib/python2.7/dist-packages/apt/deprecation.py", line 98, in deprecated_function
Apr 3 15:34:31 ubuntu plugininstall.py: return func(*args, **kwds)
Apr 3 15:34:31 ubuntu plugininstall.py: File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 427, in commit
Apr 3 15:34:31 ubuntu plugininstall.py: res = self.install_archives(pm, install_progress)
Apr 3 15:34:31 ubuntu plugininstall.py: File "/usr/lib/python2.7/dist-packages/apt/deprecation.py", line 98, in deprecated_function
Apr 3 15:34:31 ubuntu plugininstall.py: return func(*args, **kwds)
Apr 3 15:34:31 ubuntu plugininstall.py: File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 390, in install_archives
Apr 3 15:34:31 ubuntu plugininstall.py: res = install_progress.run(pm)
Apr 3 15:34:31 ubuntu plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 381, in run
Apr 3 15:34:31 ubuntu plugininstall.py: res = pm.do_install(self.write_stream.fileno())
Apr 3 15:34:31 ubuntu plugininstall.py: SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)
Apr 3 15:34:31 ubuntu plugininstall.py:
Apr 3 15:34:31 ubuntu plugininstall.py: log-output -t ubiquity chroot /target umount /sys
Apr 3 15:34:31 ubuntu ubiquity: umount: /proc: device is busy.
Apr 3 15:34:31 ubuntu ubiquity: (In some cases useful info about processes that use
Apr 3 15:34:31 ubuntu ubiquity: the device is found by lsof(8) or fuser(1))
Apr 3 15:34:31 ubuntu ubiquity:
Apr 3 15:34:31 ubuntu plugininstall.py: log-output -t ubiquity chroot /target umount /proc
Apr 3 15:34:31 ubuntu plugininstall.py: log-output -t ubiquity umount /target/dev
Apr 3 15:34:32 ubuntu plugininstall.py: broken packages after installation:

this leads to a complete broken system :X

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: ubiquity 2.5.32
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
Architecture: amd64
Date: Sun Apr 3 17:36:39 2011
ExecutablePath: /usr/share/ubiquity/plugininstall.py
InterpreterPath: /usr/bin/python2.7
LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110330)
ProcEnviron:
 LANGUAGE=de_DE:en
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
 LC_COLLATE=C
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[oli z (oliver-z)]

ps.: it leads to a broken system because the complete post-installation stuff wont get executed. after that popup the installation process is terminated ... so the system is unusable

[Jean-Baptiste Lallement (jibel)]

Thanks for your report.

The error is caused by flashplugin failing to install on amd64
nspluginwrapper: no appropriate viewer found for /usr/lib/flashplugin-installer/libflashplayer.so

It was reported and fixed in 746758. Marking as duplicate.