Phoronix: Ubuntu Still Needs Help Testing Out Intel SNA
If you are an Ubuntu Linux user and rely upon Intel integrated graphics, Ubuntu developers could use your help in trying out Intel's SNA as they decide whether to enable this experimental acceleration architecture in Ubuntu 13.04...
The testing was a success, though we've identified a minor rendering
issue with gen4 chips (#1098334), which is already known upstream.
Despite this bug we will flip the default to SNA early next week."
This article should state "Ubuntu SNA testing ended yesterday" the ML message linked was posted on the 10th of January and the wiki page https://wiki.ubuntu.com/X/Testing/IntelSNA states testing willl continue until 17th of January, and it's 18th today.