Apparently the --help output is a bit misleading, you are not supposed to specify a device with -d. But if you try without:
$ gvfs-mount -u /dev/sdb1 Error finding enclosing mount: Containing mount does not exist Both errors happen exactly the same with current git head, so regardless of whether or not -d should be used, something is wrong. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gvfs in Ubuntu. https://bugs.launchpad.net/bugs/1043848 Title: gvfs-mount -u tries to mount, unclear --help Status in “gvfs” package in Ubuntu: Triaged Bug description: I have my USB stick automounted by nautilus/gvfs. Trying to unmount it gives: $ gvfs-mount -u -d /dev/sdb1 Error mounting /dev/sdb1: Device /dev/sdb1 is already mounted at `/media/martin/4805-C45B'. Apparently it tries to mount it again instead of unmount. Same with using --unmount. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gvfs/+bug/1043848/+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