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

[showgun]

Binary package hint: aptdaemon

after latest update

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: aptdaemon 0.41+bzr595-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-6.34-generic 2.6.38-rc7
Uname: Linux 2.6.38-6-generic i686
NonfreeKernelModules: nvidia
Annotation: Applying software changes failed
Architecture: i386
Date: Sat Mar 12 02:13:19 2011
DesktopFile: /usr/share/aptdaemon/aptdaemon.desktop
ExecutablePath: /usr/sbin/aptd
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110302)
SourcePackage: aptdaemon
Title: <class 'aptdaemon.lock.LockFailedError'>: Could not acquire lock on /var/lib/dpkg/lock. The lock is hold by apt-get.
TransactionDepends: [[], [], [], [], [], [], []]
TransactionErrorCode: error-unknown
TransactionKwargs: {}
TransactionLocale: en_CA.UTF8
TransactionOutput:

TransactionPackages: [[], [], [], [], [dbus.String(u'libqt4-dbus'), dbus.String(u'libqt4-declarative'), dbus.String(u'libqt4-designer'), dbus.String(u'libqt4-help'), dbus.String(u'libqt4-network'), dbus.String(u'libqt4-opengl'), dbus.String(u'libqt4-qt3support'), dbus.String(u'libqt4-script'), dbus.String(u'libqt4-scripttools'), dbus.String(u'libqt4-sql'), dbus.String(u'libqt4-sql-mysql'), dbus.String(u'libqt4-svg'), dbus.String(u'libqt4-test'), dbus.String(u'libqt4-xml'), dbus.String(u'libqt4-xmlpatterns'), dbus.String(u'libqtcore4'), dbus.String(u'libqtgui4')], []]
TransactionRole: role-commit-packages
UpgradeStatus: Upgraded to natty on 2011-03-09 (3 days ago)