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Since Ubuntu's installation, sound never plays through the laptop speakers. However, I can get sound by listening through headphones plugged into the jack.

Any ideas on how to get the speakers to work?

I have an hp pavillion dv6 laptop running Ubuntu 12.04.

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Did you try to change the output device manually in Sound Settings? – elmicha Jul 21 '12 at 15:42
up vote 0 down vote accepted

You should probably start here :

Your problem is likely to be a bug in the "patch" code for the driver. (As in "patch panel" not "software patch".)

The process of working out what the problem is is influenced heavily by your sound hardware.

For similar problems with my Intel HDA setup, I found the HDA Analyzer utility to be helpful - this lets you manipulate card parameters manually. And also this codec graphing tool, which helps to visualize how the patch layout of the card should work.

Alas, advice for other sound hardware is outside my experience.

At a minimum level you will be able to feed back information to the ALSA team for future kernel versions. I was able to patch the kernel to fix my problem (my C is terrible, but the code concerned is quite simple), and get a fix into the main kernel with assistance from the team on the Ubuntu kernel IRC channel, but I appreciate this is probably not a standard user response to the problem :-)

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Thank you kindly for the pointers. I was planning on finding a free weekend to try to delve into it a bit. But, strangely, the sound suddenly just worked. I think it may have been one of the many updates I okayed some time ago. Thanks again nonetheless. – jonS90 Aug 3 '12 at 18:07

I have your laptop model and I've never gotten around to troubleshooting my headphone problems because I discovered a workaround: in alsamixer (either from terminal or the GUI version in repos) if I max out Master and zero out speaker the audio will come from my headphones..

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