[Bug 47796] gnome-session won't upgrade properly

[Dizzy]

Public bug reported:

can't use gnome. 
this is the message from apt-get install gnome-session

Is this a problem with gnome-session or dpkg?

Traceback (most recent call last):
  File "/usr/sbin/update-gconf-defaults", line 56, in ?
    fd=open(defaults_dir+'/'+f)
IOError: [Errno 5] Input/output error: '/usr/share/gconf/defaults/10_gnome-session'
dpkg: error processing gnome-session (--configure):
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 gnome-session
E: Sub-process /usr/bin/dpkg returned an error code (1)

** Affects: gnome-session (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

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gnome-session won't upgrade properly
https://launchpad.net/bugs/47796