Comment 18 for bug 406460

I set up a PPA for Karmic that will roll libdrm and xserver-xorg-video-intel back to the Jaunty versions:
https://launchpad.net/~brian-rogers/+archive/graphics-testing

I haven't tested this yet, so be prepared to undo it from the command line if it breaks X.

If this old userspace stuff works fine in the new kernel, it may not be the kernel's fault at all. In that case, I'll step my PPA forward one version at a time and we can find out when the problem first appeared.