Comment 1 for bug 601370

Because the current version of my xserver-xorg-video-intel package
was from the x-swat repository, I downgraded to the Lucid version.

$ apt-cache policy xserver-xorg-video-intel
xserver-xorg-video-intel:
  Installed: 2:2.9.1-3ubuntu5
  Candidate: 2:2.9.1-3ubuntu5
  Version table:
 *** 2:2.9.1-3ubuntu5 0
        500 http://us.archive.ubuntu.com/ubuntu/ lucid/main Packages
        100 /var/lib/dpkg/status

Unfortunately, the problem still occurs.