Comment 118 for bug 1386721

I can replicate the exact same issue that Celian demonstrates in his YouTube videos. In my instances, my Laptop (Lenovo T400) acts exactly the same way, however I have found the following:

If I set modeset for my i915 video driver to 1 (or 0, which pulls the setting of DRM_I915_KMS=y from the kernel config), my framerate increases from 60fps to ~1000fps. This also fixes the sluggishness Celian and others have been complaining about, at least in my instance.

Adding "options i915 modeset=0" to /etc/modprobe.d/i915-kms.conf may be of benefit to some users of the i915 module on this bug report.