It looks that I have a similar issue in natty: Bug 775014 Only partial unmounting during shutdown.
That "partial" unmounting is not correct: checking in dmesg I saw that any filesystem fails to unmount. Since I updated to Ubuntu 11-04 after the patches were applied, I wonder whether there was a patch reversal. Bernhard util-linux: Installiert: 2.17.2-9.1ubuntu4 Kandidat: 2.17.2-9.1ubuntu4 Versionstabelle: *** 2.17.2-9.1ubuntu4 0 500 http://mirror.informatik.uni-mannheim.de/pub/linux/distributions/ubuntu/ natty/main i386 Packages 100 /var/lib/dpkg/status -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/579858 Title: umount segfault on shutdown when unmounting autofs mountpoint -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs