I can concur with rgrig that under Kubuntu 13.04 booting with a 3.5 kernel rather than a 3.8 kernel solved the issue for me.
Also, as with rgrig, the other workarounds didn't work for the 3.8 kernel.
I can concur with rgrig that under Kubuntu 13.04 booting with a 3.5 kernel rather than a 3.8 kernel solved the issue for me.
Also, as with rgrig, the other workarounds didn't work for the 3.8 kernel.