Xserver 1.18.2 was released yesterday, and it’s now available for xenial on the staging PPA. It has a fair number of fixes for glamor, DRI2/DRI3/Present and others. Plan is to move it to the main repository next week. The PPA also has a minor update to xserver-xorg-video-intel, and the latest release candidate for Mesa 11.2.0 which has a feature-freeze exception bug filed. Feel free to add comments about success/failure there, and for xserver/intel file a bug against the source package (xorg-server, x-x-v-intel). Happy testing!
Xserver 1.18.2, Mesa 11.2.0-rc3 in staging ppa