X is fine. It is OpenGL that is slow. Solution stop using an OpenGL compositor that triggers software fallbacks in its most frequent operations. Compare with xfce4 for example.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1267384 Title: 8086:29b2 [HP Compaq dc7800 Convertible Minitower PC] 82Q35 graphics acceleration performance worse than it could be To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1267384/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp

