Comment 9 for bug 894070

In my prior comment I meant the 3.1.0-2.3 kernel:
https://launchpad.net/ubuntu/+source/linux/3.1.0-2.3/+build/2885386

I would also like to have you test a couple of mainline kernels, to rule out an Ubuntu patch as a cause. Can you test with the upstream v3.1 kernel and upstream v3.2-rc2 kernel?

v3.1:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.1-oneiric/

v3.2-rc2:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.2-rc2-oneiric/

We would expect v3.1 to work and v3.2-rc2 with exhibit the issue.

So to summarize, can you please test the following kernels and report the results:
1. Ubuntu 3.1.0-2.3
2. Mainline 3.1
3. Mainline 3.2-rc2

Once we have this data, we will know the best starting version to start the bisect.