I just updated the xserver-xorg-core package to xserver-xorg-core_1.15.1-0ubuntu2_amd64.deb and I can confirm that the corrupted graphics problem is now fixed.
I just updated the xserver-xorg-core package to xserver- xorg-core_ 1.15.1- 0ubuntu2_ amd64.deb and I can confirm that the corrupted graphics problem is now fixed.