This graph concerns both open and closed-source driver issues along with general X.Org related issues. The metrics also aren't limited to just output/graphics only, but include the input driver issues too. The slide was shared Tuesday of the Ubuntu Developer Summit in Oakland when talking about the X.Org planning for Ubuntu 12.10.
Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.