With "udevadm monitor -e --udev" I get a very long output (see attachment). I tried it two times, both times the usb flash drive was not automounted. You'll find the complete output in the attachment - hope this helps you!
** Attachment added: "udevadm monitor Nico" http://launchpadlibrarian.net/35489974/udevadm%20monitor%20Nico -- usb flash drive fails to mount https://bugs.launchpad.net/bugs/450546 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gvfs in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs