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Continuous crackling from moment Ubuntu starts up.

When playing sound gives interruptions.

I didn't experience any sound problem in Windows before I installed Ubuntu (ubuntu is great btw).

Continuous switching between speakers and headphones in sound settings.

Crackling continues when pulseaudio turned off.

Difficulty adjusting sound levels in alsamixer.

Same problem under all linux OS.

I tried editing sample rate in daemon.conf or tsched=0 in default.pa, checking archlinux site and some basic bug solutions for ALSA,reinstalling different linux OS, but no newbie luck..

there's a short video I made of the problem: https://www.facebook.com/photo.php?v=486149771507522&l=6160322189117296858

see also more info on my system on : ALSA Information Script v 0.4.63 (for linux, kernel, alsa sound info at) http://www.alsa-project.org/db/?f=050330a52b4870e7ed9d72af30adb1a4987e7dcc

and a bug report I posted at http://www.bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1294830 : HP Compaq dc7600 Small Form Factor, Realtek ALC260, Green Line Out, Rear Underruns, dropouts or crackling sound. I received feedback on this but it's too technical for me.

thx for any advice,

bless

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  • IS the problem also in Windows? I couldn't understand.
    – Mr.Lee
    Mar 25, 2014 at 18:37
  • I didn't have sound problems in Windows before, but tired of it I made the change to Ubuntu. A little disappointed only I couldn't fix this sound problem. At the same time happy about the opportunity to learn about Ubuntu :)
    – Bosdwerg
    Mar 25, 2014 at 19:03
  • So to clarify, Windows is no longer on this machine.
    – Mr.Lee
    Mar 25, 2014 at 19:41
  • It isn't. I chose to make the step to open-source.
    – Bosdwerg
    Mar 25, 2014 at 19:43
  • Go into alsamixer in terminal and see if you can mute the device by pressing m
    – Mr.Lee
    Mar 25, 2014 at 19:46

1 Answer 1

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Try this link. Seems to me that your system is switching between headphones and speakers. Crackling is usually caused by powering a speaker. Since the speakers are constantly being powered on and off, it would keep crackling. This package lets, you control the headphone switching.

Same package, another description

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  • Thanks for your time. This seems to solve the unstable sound settings, the sound interruptions, the switching between headphones and speakers. The sound is ok now, that is sufficient enough for me. It does not however stop a continuous ticking or what I called crackling when no sound is being played.
    – Bosdwerg
    Mar 25, 2014 at 21:06
  • Glad to hear that it helped somewhat. Have you tried lowering the volume to see if the crackling get lower?
    – Mr.Lee
    Mar 25, 2014 at 21:11
  • Exactly. The crackling is quite soft. I hardly hear it at the amount of volume I need to hear music. When I turn the volume up, the crackling sound output increases.
    – Bosdwerg
    Mar 25, 2014 at 21:14
  • My guess is that it is static. This varies from speakers and sound card. There isn't much you can do software wise if this is the case. The only tweak that might help is checking if you have an EQ (equalizer) on and disabling it or setting it to default volumes. Example of an equalizer
    – Mr.Lee
    Mar 25, 2014 at 21:18
  • ok. I don't seem to have an EQ. Could you tell me why this problem occurs after installing Ubuntu and not in Windows before?
    – Bosdwerg
    Mar 25, 2014 at 21:41

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