Using HDMI for video output and audio through the output jack?

When you have an HDMI device connected, the OS may automatically assume that you want audio sent to that device. There may or may not be any way to override that assumption and send the audio elsewhere by choosing another output device in System Preferences > Sound. I don't have an HDMI display, so I can't test to find out.

I have the exact same issue. What's odd is this.

I can connect the mini display to HDMI that goes into my stereo for video. Then I use the .35mm headphone jack for audio. They both work seperately, but not together. The HDMI overrides the display and won't allow for me to choose the audio to go over the headphone jack.

Any ideas?

Get an adapter that sends both signals to your AV receiver through HDMI:

http://www.monoprice.com/products/product.asp?c_id=104&cp_id=10428&cs_id=1042802 &p_id=5311&seq=1&format=2

If your MBP doesn't output audio through its mini-Displayport, use an adapter like this:

http://www.kanexlive.com/iadapt51

There isn't a software solution? I don't really wanna get more cables! I'm in danger of getting a cable explosion over here! 😝

Nope, no software solution. You'd be *reducing* cable connections with either of the adapters I linked above.

Ok, so hold on a second. I don't think this will work. The audio jack is essentially being disabled when the HDMI is plugged in. If I unplug the mini display works through the audio jack. When I plug the Mini-Display-HDMI back in, it stops.

I actually just found out today though something AMAZING!

Apparently, the new AppleTV will support mirroring, and do so wirelessly. This is going to be the best solution for me.

Thanks for the help though.

the new AppleTV will support mirroring, and do so wirelessly.

Yes, but only from iPad's and iPhones's at the moment, not from your MacBook Pro. Lion and older versions of OS X will not wirelessly transmit the display to Apple TV - you will have to wait for Mountain Lion in order to do that.