Chris Wilson has released yet another driver update in the xf86-video-intel 2.20
This latest update though isn't just centered around Chris pushing out more SNA acceleration architecture updates, but it just has a couple of fixes.
In particular, with binding the DDX driver to a proper Intel kernel driver, which was a change from the previous release, it was accidentally binding this X.Org driver to Intel Poulsbo, Medfield, and Cedarview graphics cores too. That's a problem since this open-source driver doesn't work with those graphics cores that are derived from Imagination PowerVR SGX IP and use a completely different driver code-base. This binding issue to the PowerVR cruft has been fixed and so that warranted pushing out this latest point release.
There's also a regression fix for bitmap-to-region code and over four dozen other "Sandy Bridge New Acceleration" 2D acceleration code changes from Chris that he's made in the last couple of days.
Find more in the intel-gfx release announcement