Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

I don't know if this problem happened when I installed Ubuntu before.

Recently I noticed that when I boot Ubuntu, the Digital Audio Output light automatically switches on. Digital Audio Output light on means "Something wrong in the headphone port". Although my headphone is working in Ubuntu.

I've heard that the headphone contains some magical "switch" that will fix the light problem. So I poked the headphone port with chopsticks, pens, paper clips, even my finger, and the Digital Audio Output light still stays on.

I don't have this problem in OSX.

How do I switch the light off?

share|improve this question
1  
It's not a warning light - it's the optical digital output, which also uses the headphone port. Still, it would be good if it wasn't on when you're not using it! –  Jeremy Kerr Jun 27 '12 at 1:17
    
I thought it was! To me, everything that is bright and red is a warning sign. Anaways, do you know how to fix it? –  Emerson Hsieh Jun 27 '12 at 1:24
add comment

2 Answers

up vote 3 down vote accepted

This is the digital audio output (optical SPDIF), not a warning light. You should be able to turn it off with:

amixer set IEC958 off
share|improve this answer
add comment
  1. Open Terminal by Ctrl + Alt + T
  2. Type in sudo alsamixer
  3. Use the arrow keys to move around and when over S/PDIF press M to mute, this will turn the light OFF.
  4. Hit the Escape key - DO NOT CLOSE TERMINAL
  5. Type sudo alsactl store - This will make it persist across reboots
  6. Close Terminal
share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.