Comment 21 for bug 406460

Yeah, there's an ABI change for X Server 1.7 in Lucid, so drivers built for earlier versions won't work there. And unfortunately, I wasn't able to build version 2.6.3 for Lucid. But I'm going to post my PPA info to bug 456902, which might be the same issue.

If someone on Karmic verifies that 2.6.3 doesn't experience the freeze on kernel 2.6.31, then we can step forward and find where the issue first appeared in the X driver. If it turns out to be a recent enough version, I should be able to also build a Lucid version before and after the change to find out if your problem is the same.