Comment 4 for bug 1446469

Martijn Starrenburg to bring a resolution to the problem : https://plus.google.com/+AlexTheDirtchamber/posts/WMCYTRvyi4P?cfem=1

Martijn Starrenburg wrote :

The problem is that SNA acceleration for Intel drivers in kernel 3.16 (Freya's default kernel) is activated by default.
This was not the case for kernel 3.13 (Freya Beta2)
To check this just run this command

cat /var/log/Xorg.0.log | grep SNA

What I did to fix this is:
Create a file called 20-intel.conf in the /usr/share/X11/xorg.conf.d/ directory.
Put this content in the file (enable the "old" UXA acceleration method):

Section "Device"
   Identifier "Intel Graphics"
   Driver "intel"
   Option "AccelMethod" "uxa"
EndSection

Save the file and reboot.