HP Pavilion dm4-2070us Sound stop when put the headphone jack

When I remove or put the headphones jack, the sound stops to work in the speakers and in the headphones. To turn it back, I have to close the player(music, video or sound streamer from the web site) and start it again, but if the headphones is pluged in it works very well, if I remove the jack stop again, it happens in reverse case.
Could you please tell me the solution for this problem?
Notebook info
IDT High Definition Audio CODEC
Genuine Windows 7 Home Premium 64-Bit  SP1
Intel(R) Core(TM) i5-2410M
6GB system memory
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I had the same problem with dm4-2070us and I just finished chatting with HP customer service. The representative asked me to do few things including setting the BIOS to default. I also reinstalled the driver. NOTHING WROKED.
He told me to do a  complete revovery of the system to factory reset. I didn't want to go that route.
What I did is downloaded the older driver for dm4-1162us and installed on my dm4-2070 and it fixed the problem. Now the only thing I'm missing is the Dolby sound, about which I don't care that much.
Hope this help you also.
Conclusion: It's a software problem. May HP come uo with a new driver to fix it, SOON.