I have an E6540 connected to an E-Port docking station, running Windows 7 64 Professional.
I just upgraded everything to the latest version, i.e. BIOS to A16, Audio drivers and audio manager to NCN00_WN32_126.96.36.19969_A11, and now the speaker jack on the dock is no longer working. It does even show up on the list of audio devices. The built in speakers/microphone and the headset jack on the laptop works fine, as does everything else on the dock (video, USB ...).
Solved! Go to Solution.
After upgrading BIOS to A17, the dock port now works as "headphone", provided that nothing is connected to the headset port on the machine itself.