This bug is not actionable as it stands. I don't reproduce this problem and no one else has reported similar behavior in the few months since it was reported so guessing it's either something peculiar to kwin or a configurational issue.
Fwiw, for performance bug reports you should provide measurements such as framerate measurements from a game (NOT glxgears; glxgears performance bug reports are not accepted). The general debugging process for such issues when they are regressions from older versions is to identify the most recent version where it worked properly, too. ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/680135 Title: natty Intel Corporation Mobile 945GM/GMS, 943/940GML bad performance -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs