This was incorrectly marked as a duplicate of another bug. From VarLogDistupgradeApttermlog.gz we see:
Traceback (most recent call last):^M File "/usr/share/ubuntustudio-audio/rtprio.py", line 18, in <module>^M rtprio.rm_setting()^M File "/usr/lib/python2.6/dist-packages/changesettings.py", line 80, in rm_setting^M self.rm_list.remove(self.remove_string)^M ValueError: list.remove(x): x not in list^M dpkg: error processing /media/cdrom0//pool/universe/u/ubuntustudio-meta/ubuntustudio-audio_0.63_i386.deb (--unpack):^M subprocess new pre-removal script returned error exit status 1^M ** This bug is no longer a duplicate of bug 562706 On i386, selecting the ubuntu studio packages fails to install -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/458870 Title: package ubuntustudio-audio 0.52 failed to install/upgrade: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntustudio-meta/+bug/458870/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs