/etc/init.d/umountroot does not execute umount, it executes mount with '-o remount,ro' flags to remount the root filesystem in read-only mode. Some process has a file open for write on the root filesystem, which causes the remount to fail. See Bug #963106 and please try my suggestion of unchecking 'Available to all users' in the Network Manager settings for your network connection.
In any case the message that we should get while shutting down should be umount / is busy, why is it mount? -- You received this bug notification because you are subscribed to the bug report. https://bugs.launchpad.net/bugs/1019347 Title: A message: "mount: / is busy" appears every time shutting down or rebooting. Status in “plymouth” package in Ubuntu: Confirmed Status in “upstart” package in Ubuntu: Invalid Bug description: I arrived here from bug 963106 [https://bugs.launchpad.net/bugs/963106]. I thought that it was a problem with network-manager, but it was not. I was suggested that it is probably a problem with upstart : "that modemmanager simply hasn't had time to complete the shutdown process before umountroot is run. Since modemmanager is an upstart job, sendsigs doesn't kill it." lsb_release -rd: Description: Ubuntu 12.04 LTS Release: 12.04 apt-cache policy upstart: upstart: Installed: 1.5-0ubuntu7 Candidate: 1.5-0ubuntu7 Version table: *** 1.5-0ubuntu7 0 500 http://kambing.ui.ac.id/ubuntu/ precise-updates/main amd64 Packages 100 /var/lib/dpkg/status 1.5-0ubuntu5 0 500 http://kambing.ui.ac.id/ubuntu/ precise/main amd64 Packages Hope this will be fixed. Thanks. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: upstart 1.5-0ubuntu7 ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19 Uname: Linux 3.2.0-26-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.0.1-0ubuntu8 Architecture: amd64 Date: Sat Jun 30 00:08:18 2012 InstallationMedia: Custom Live CD - Release amd64 SourcePackage: upstart UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1019347/+subscriptions -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1019347 Title: A message: "mount: / is busy" appears every time shutting down or rebooting. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1019347/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
