I can confirm that I observed a similar behavior like Lorenz. In addition in both the times when this error occurred , samba and winbind were the packages where update manager seems to be stuck. There were also a message that /var/cache/debconf/config.dat was locked. I have to finally kill the process but I am now stuck with some broken packages.
-- update-apt-xapian-index crashed with DatabaseLockError in __init__() https://bugs.launchpad.net/bugs/590998 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs