This is happening for me on my Thinkpad R61 after upgrading to Ubuntu 13.04 (kernel 3.8.0-19), but it was working fine with the leftover kernel from Ubuntu 12.10 (kernel 3.5.0-27).
This is happening for me on my Thinkpad R61 after upgrading to Ubuntu 13.04 (kernel 3.8.0-19), but it was working fine with the leftover kernel from Ubuntu 12.10 (kernel 3.5.0-27).