I am running 12.04 64bit and no matter what I do or what method I try things lock up when I try to mount my Galaxy Nexus filesystem.
When issuing a mount any attemp at say 'ls' of a directory the mount is in will freeze the 'ls'.
ie: ls /media/GalaxyNexus
Its not until I UNPLUG the phone that it unfreezes and thinks its mounted.
11.10 worked fine. Any ideas?