<class 'aptdaemon.lock.LockFailedError'>: Could not acquire lock on /var/lib/dpkg/lock. The lock is hold by dpkg.

[zeruke]

Binary package hint: aptdaemon

happened when i was trying to update through the update manager

apport poped up with this one after https://bugs.launchpad.net/ubuntu/+source/aptdaemon/+bug/742780

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: aptdaemon 0.41+bzr604-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-7.38-generic 2.6.38
Uname: Linux 2.6.38-7-generic i686
NonfreeKernelModules: nvidia wl
Annotation: Applying software changes failed
Architecture: i386
Date: Fri Mar 25 16:10:47 2011
DesktopFile: /usr/share/aptdaemon/aptdaemon.desktop
ExecutablePath: /usr/sbin/aptd
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110309)
SourcePackage: aptdaemon
Title: <class 'aptdaemon.lock.LockFailedError'>: Could not acquire lock on /var/lib/dpkg/lock. The lock is hold by dpkg.
TransactionDepends: [[], [], [], [], [], [], []]
TransactionErrorCode: error-unknown
TransactionKwargs: {}
TransactionLocale: en_US.UTF8
TransactionOutput:

TransactionPackages: [[], [], [], [], [dbus.String(u'gir1.2-dee-0.5'), dbus.String(u'gir1.2-unity-3.0'), dbus.String(u'hpijs'), dbus.String(u'hplip'), dbus.String(u'hplip-cups'), dbus.String(u'hplip-data'), dbus.String(u'libdee-1.0-1'), dbus.String(u'libhpmud0'), dbus.String(u'libpangomm-1.4-1'), dbus.String(u'libpython2.6'), dbus.String(u'libpython3.2'), dbus.String(u'libqt4-dbus'), dbus.String(u'libqt4-declarative'), dbus.String(u'libqt4-network'), dbus.String(u'libqt4-opengl'), dbus.String(u'libqt4-script'), dbus.String(u'libqt4-sql'), dbus.String(u'libqt4-sql-mysql'), dbus.String(u'libqt4-svg'), dbus.String(u'libqt4-xml'), dbus.String(u'libqt4-xmlpatterns'), dbus.String(u'libqtcore4'), dbus.String(u'libqtgui4'), dbus.String(u'libsane-hpaio'), dbus.String(u'libunity3'), dbus.String(u'python-cupshelpers'), dbus.String(u'python2.6'), dbus.String(u'python2.6-dev'), dbus.String(u'python2.6-minimal'), dbus.String(u'python3.2'), dbus.String(u'python3.2-dev'), dbus.String(u'python3.2-minimal'), dbus.String(u'sudo'), dbus.String(u'system-config-printer-common'), dbus.String(u'system-config-printer-gnome'), dbus.String(u'system-config-printer-udev')], []]
TransactionRole: role-commit-packages
UpgradeStatus: No upgrade log present (probably fresh install)

[[e-mail] (mcnamara-edward)]

This happened after I tried to Update Ubuntu One.. The required update that enables syncing.. It said it could not update and then this message came up.