I can confirm this issue, it appeared after upgrading from 3.2.0-35 to 3.2.0-36. The quantal kernel (3.5.0-22) is also affected. Selecting the old kernel in grub makes the warnings go away.
I tried to locate the cause of this problem but during unmount no handles remain open. Somehow the kernel blocks the /home filesystem internally ... lsof reports no open files in /home fuser -v -a -m reports no open files in /home losetup reports no open loop files in /home there are not swap-files in /home -> there is no reason why the kernel blocks unmounting. For debugging purposes, you might use the attached script and put it into /etc/rc0.d and /etc/rc6.d, i have found it in some forum and adopted it slightly. ** Attachment added: "S57WhatIsLeft" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1101797/+attachment/3492499/+files/S57WhatIsLeft -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1101797 Title: On shutdown: “umount2: Device or resource busy, umount:/dev/sda2 busy - remounted read-only” appears To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1101797/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
