I could nail down the issue a little. Installing xserver-xorg-video-intel from experimental (with no need to upgrade other components of the stack) is enough to fix it and get DRI2 support and full hardware rendering.
-- Andrea Colangelo | http://andreacolangelo.com Debian Developer <[email protected]> | Ubuntu Developer <[email protected]> -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]

