On 25 January 2015 at 15:10, Rohan McLeod <rhn@jeack.com.au> wrote:

Not clear to me that the above, eliminated possibility that,
the Nvidia GeForce GT 640 Windows driver update;
some how corrupted the installed Debian/wheezy driver ?

The grub boot menu displays fine, and I am rather sceptical that memtest could be corrupted in exactly the same way.

Brian May <brian@microcomaustralia.com.au>