Comment 36 for bug 1432194

Switching from SNA to UXA downgrade 2D day-to-day performances as SNA is the not-so-new default acceleration method for recent Intel graphics card (as in my case Broadwell HD 5500). More info about performances here :
http://www.phoronix.com/scan.php?page=article&item=intel_2dxorg30_ubuntu1404&num=1

For example, at startup, the only icon folder on my desktop is now displayed slowly with UXA rather than SNA. However as Luke #32 said before this is better to have this workaround than missing letters problem, but it's only a workaround, not a real solution.

@girisha #35: forget about xf86-video-intel, your xorg.log show you have Intel driver :
 3.831] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20080730
[ 3.831] (II) intel(0): SNA compiled: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4.2 (Maarten Lankhorst <email address hidden>)

In any case, try to create the following folder:
sudo mkdir /etc/X11/xorg.conf.d/

Then create inside the new folder a file named for example "20-intel.conf" with the following content:
Section "Device"
 Identifier "Card0"
 Driver "Intel"
 Option "AccelMethod" "uxa"
EndSection

Then reboot and voila. If something goes wrong (if X server failed for example), you just have to delete the 20-intel.conf to revert back.