intel8x0 headphone jack no sound

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taran
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Joined: Sun May 01, 2011 2:28 am

intel8x0 headphone jack no sound

Post by taran » Sun May 01, 2011 2:43 am

Problem Description: Dell Inspiron 5150 laptop with onboard intel8x0 sound card. MythTV boots and runs fine, however no sound plays through headphone jack. Unplug headphone wire, laptop speakers work.

Root Cause: After much searching and alsa troubleshooting, it turned out to be a very simple problem. By default MiniMyth had muted the headphone jack.

Solution:
1.) From MiniMyth terminal (console, telnet, ssh) use the alsa mixer program to unmute the Headphone channel and set volume at 100%.
'amixer sset Headphone 100 unmute'
2.) Confirm that sound does now work.
3.) Save alsta state.
'alsactl store -f /path_to_save/asound.state'
4.) Move asound.state file into read-only conf directory
5.) Modify minimyth.conf file to read asound.state
add MM_AUDIO_FETCH_ASOUND_STATE='yes'
6.) ???
7.) Profit

References (may be useful for other problems than this one)
http://alsa.opensrc.org/Intel8x0#Dell_Laptops
http://alsa.opensrc.org/.asoundrc
http://www.mythtv.org/wiki/Configuring_ ... _Utilities

Hope that saves someone a few hours of writing asound.conf files.

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