The underlying problem is that, at system shutdown time, dhclient isn't given the opportunity to gracefully exit, closing any files it has open. This causes /etc/init.d/umountroot to fail. When umountroot fails, the filesystem must be recovered.
There is, to the best of my knowledge, nothing particularly unusual with the various installs of 12.04 that I've been testing, and the problem is evident with all of them. One difference might be that I have the splash screen turned off in grub and so can see the messages. Maybe that explains why you're not seeing them. At some point, possibly in oneiric, changes were made which put the dhclient pid in /var/run/sendsigs.omit.d/ and I believe that's the basis of the problem. And it IS a problem - the root filesystem should not need recovery on every reboot. The "orphaned inodes" messages are just icing on the cake. Do "sudo apt-get install --reinstall libc6" then reboot, and run "dmesg | grep EXT" and you should see the messages. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/963106 Title: NetworkManager causes orphaned inodes Status in “network-manager” package in Ubuntu: Incomplete Status in “network-manager” source package in Precise: Incomplete Bug description: During system shutdown, NetworkManager neither kills dhclient nor does it remove the dhclient pid file from the directory /var/run/sendsigs.omit.d. As a result, dhclient continues to hold the pid file open for write and when /etc/init.d/umountroot tries to remount the root filesystem read-only, the remount fails. The message: mount: / is busy is seen in the console, and the filesystem must be recovered at boot time: [ 8.946427] EXT4-fs (sda1): INFO: recovery required on readonly filesystem [ 8.947057] EXT4-fs (sda1): write access will be enabled during recovery [ 11.234075] EXT4-fs (sda1): recovery complete If shared libraries used by dhclient are updated before the reboot, orphaned inodes associated with the .so files are created. For example, doing "sudo apt-get install --reinstall libc6" and then rebooting leads to: [ 8.356521] EXT4-fs (sda1): INFO: recovery required on readonly filesystem [ 8.356521] EXT4-fs (sda1): write access will be enabled during recovery [ 8.716544] EXT4-fs (sda1): orphan cleanup on readonly fs [ 8.716544] EXT4-fs (sda1): ext4_orphan_cleanup: deleting unreferenced inode 313749 [ 8.724544] EXT4-fs (sda1): ext4_orphan_cleanup: deleting unreferenced inode 313733 [ 8.724544] EXT4-fs (sda1): ext4_orphan_cleanup: deleting unreferenced inode 313725 [ 8.724544] EXT4-fs (sda1): 3 orphan inodes deleted [ 8.728544] EXT4-fs (sda1): recovery complete This is network-manager 0.9.3.995+git201203152001.04b2a74-0ubuntu1 running under 12.04. I don't believe any actual data loss will occur as a result of this bug, but it's likely to produce much user anxiety. Also see Bug 952315, which misidentifies the cause of the problems as upstart. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: network-manager 0.9.3.995+git201203152001.04b2a74-0ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12 Uname: Linux 3.2.0-20-generic i686 ApportVersion: 1.95-0ubuntu1 Architecture: i386 CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. Date: Fri Mar 23 07:42:20 2012 InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111011) IwConfig: lo no wireless extensions. eth0 no wireless extensions. NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true ProcEnviron: TERM=xterm LANG=en_US.UTF-8 SHELL=/bin/bash RfKill: SourcePackage: network-manager UpgradeStatus: Upgraded to precise on 2012-03-02 (20 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/963106/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
