This is also happening to me, but in a slightly different manner. Again on a clean install of 10.10.
If I am logged in to the console X session the USB disks will mount. However, I get errors in other VNC sessions (e.g., extra X sessions) that I don't have permission to mount the disk. Indeed, if I am not logged in at the console the drive will not mount even though I am logged in via another VNC session. This points to a more fundamental issue with the detection of when a user should have rights to do something. Interestingly, I can no longer shutdown from the menu bar at this point as others have said. (http://ubuntuforums.org/showthread.php?p=10402198) I could do this before I installed and ran VNC server. I suspect this means that having two Gnome sessions running at once, or having one running inside VNC, or installing vnc, caused the problem. Possibly also related, I ran into the also-reported problem that my VNC session started up with the key "d" mapped to "hide all windows" and had to unmap this. Perhaps there is some corruption going on here? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/518533 Title: Unable to mount location Not Authorized after nautilus upgrade -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs