Comment 8 for bug 1260128

Found what generates & regenerates the xorg.conf & patched to include the tearfree line.
Users wishing to test can get an patched ubuntu-driver-common here, instructions on page to get going & how to purge if unsuitable.

Note that it's for Trusty only
https://launchpad.net/~mc3man/+archive/ubuntu/tearfree-test