Odd HDMI audio problem with Lenovo S12 ION

I experienced this problem after setting up the HDMI output with the S12 ION. I have the stereo system connect to my Gardo SR-8i. All is well.... but then...

I put on the headphone, listen to American Dad, and found that the sound is not stereo. Left channel is missing. What s going on.

The strange part is that the problem can be solved by going to:

• Right click on the volumn icon on system tray.
• Select [Playback devices]
• Right click on [NVIDIA HDMI Out], and select "Test", you will hear the left right test sound, and the problem with be fixed at the same time.

I have a feeling that there's something wrong with the NVidia driver. In fact meantime, beside this work around, maybe aorund option will be using the headphone jack instead.