Thanks for your report.
From your log file the error is
=
Unpacking nvidia-settings (from .../nvidia-settings_177.78-0ubuntu2_amd64.deb)
...
dpkg: error processing
/var/cache/apt/archives/nvidia-settings_177.78-0ubuntu2_amd64.deb (--unpack):
failed in buffer_write(fd) (10, ret=-1): backend
** Attachment added: DpkgTerminalLog.txt
http://launchpadlibrarian.net/19263733/DpkgTerminalLog.txt
--
package nvidia-settings None [modified:
/var/lib/dpkg/info/nvidia-settings.list] failed to install/upgrade: failed in
buffer_write(fd) (10, ret=-1): backend dpkg-deb during
