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Thread: Cracking sound trough speakers

  1. #1
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    Exclamation Cracking sound trough speakers

    Hi there!
    Yesterday I installed 11.4 in my HP laptop and managed to make all my hardware work.

    But I got this annoying cracking sound trough the speakers every once in a while, specially when some on screen stuff appears (like the translucid volume bar) or a new window or whatever.

    It even does it with the sound muted.
    I had Kubuntu 9.04 installed in this laptop since Apr/2009 until yesterday and had no such issues.

    My sound specs:
    Code:
    sergio@laptop-sergio:~> cat /proc/asound/*/*
    Codec: Conexant CX20549 (Venice)
    Address: 0
    AFG Function Id: 0x1 (unsol 0)
    MFG Function Id: 0x2 (unsol 1)
    Vendor Id: 0x14f15045
    Subsystem Id: 0x103c30cf
    Revision Id: 0x100100
    Modem Function Group: 0x2
    Codec: Conexant CX20549 (Venice)
    Address: 0
    AFG Function Id: 0x1 (unsol 0)
    MFG Function Id: 0x2 (unsol 1)
    Vendor Id: 0x14f15045
    Subsystem Id: 0x103c30cf
    Revision Id: 0x100100
    Modem Function Group: 0x2
    Default PCM:
        rates [0x140]: 48000 96000
        bits [0xe]: 16 20 24
        formats [0x1]: PCM
    Sound Driver:3.8.1a-980706 (ALSA v1.0.23 emulation code)
    Kernel: Linux laptop-sergio.HUSKY01 2.6.37.1-1.2-desktop #1 SMP PREEMPT 2011-02-21 10:34:10 +0100 i686
    Config options: 0
    
    Installed drivers: 
    Type 10: ALSA emulation
    
    Card config: 
    HDA NVidia at 0xf6480000 irq 21
    
    Audio devices:
    0: CONEXANT Analog (DUPLEX)
    
    Synth devices: NOT ENABLED IN CONFIG
    
    Midi devices: NOT ENABLED IN CONFIG
    
    Timers:
    31: system timer
    
    Mixers:
    0: Conexant CX20549 (Venice)
    Client info
      cur  clients : 1
      peak clients : 1
      max  clients : 192
    
    Client   0 : "System" [Kernel]
      Port   0 : "Timer" (Rwe-)
      Port   1 : "Announce" (R-e-)
    Client  14 : "Midi Through" [Kernel]
      Port   0 : "Midi Through Port-0" (RWe-)
    Code:
    lspci
    00:07.0 Audio device: nVidia Corporation MCP67 High Definition Audio (rev a1)
    I thought it was something about pulseaudio and tried to remove it [1], but it just didnt worked out.
    I could not start KDE w/o some of the pulseaudio libraries, so I just reinstalled it

    [1] SDBulseaudio - openSUSE

    Anyone knows what to do about this?
    I also could not find where to enable ALSA only and disable PulseAudio.

    Thanks for your help.

  2. #2
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    Default Re: Cracking sound trough speakers

    It seems I cannot edit my post or have a signature, so here are the laptop's specs:
    HP Pavilion DV6646us: AMD 1.9 GHz Turion 64 X2 / 2Gb RAM / 160Gb HDD / NVIDIA GeForce Go 7150M / 15.4" WXGA / BroadCom BCM4311 wireless / Built-in webcam.

  3. #3
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    Default Re: Cracking sound trough speakers

    You can disable pulse in Yast > Hardware > sound > other (drop down)

    If you have a set of headphones or earphones, plug them in and see if they crackle .... (Just want to make sure it's not some flaky wire/connection on your speakers)
    Tumbleweed_KDE
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  4. #4
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    Default Re: Cracking sound trough speakers

    Quote Originally Posted by caf4926 View Post
    You can disable pulse in Yast > Hardware > sound > other (drop down)

    If you have a set of headphones or earphones, plug them in and see if they crackle .... (Just want to make sure it's not some flaky wire/connection on your speakers)
    Hey caf,
    that didnt work. I disabled pulseaudio, rebooted, but the crackling noise is still there.
    If I plug the headphones, I still hear it in both phones and speakers.

    I have XP dual-boot and theres no noise with it. There was no noise with Kubuntu a couple of days ago.

    Any other ideas guys?

  5. #5
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    Default Re: Cracking sound trough speakers

    Can I ask if you did the multimedia?
    Multimedia in One Click
    Tumbleweed_KDE
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  6. #6
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    Default Re: Cracking sound trough speakers

    Quote Originally Posted by caf4926 View Post
    Can I ask if you did the multimedia?
    Multimedia in One Click
    Just did and rebooted. Noise still there.
    I updated al ALSA related packages, rebooted and nothing!
    Code:
    sergio@laptop-sergio:~> rpm -qa |grep alsa
    alsa-firmware-1.0.24.1-3.1.noarch
    pyalsaaudio-0.6-2.pm.2.1.i586
    alsa-utils-1.0.24.2-3.1.i586
    alsa-plugins-1.0.24-6.1.i586
    projectM-libvisual-alsa-2.0.1-1.pm.2.1.i586
    alsamixergui-0.9.0rc1-749.1.i586
    alsa-tools-gui-1.0.24.1-4.5.1.i586
    alsa-plugins-jack-1.0.24-6.1.i586
    alsa-tools-1.0.24.1-4.5.1.i586
    pyalsa-1.0.22-4.1.i586
    alsa-plugins-pulse-1.0.24-6.1.i586
    alsa-1.0.24.1-4.7.1.i586
    alsa-oss-1.0.17-32.1.i586
    Thanks!
    Last edited by sergiom99; 25-Apr-2011 at 10:00. Reason: rpm

  7. #7
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    Default Re: Cracking sound trough speakers

    Can I ask, what you are using to play sounds?
    Have you tried different applications
    What about the test sound in Yast, is that crackly ?
    Tumbleweed_KDE
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  8. #8
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    Default Re: Cracking sound trough speakers

    Quote Originally Posted by caf4926 View Post
    Can I ask, what you are using to play sounds?
    Have you tried different applications
    What about the test sound in Yast, is that crackly ?
    The sounds per se are not cracky. Its just a crackling noise everyonce in a while.
    Test sound is fine.
    I played a DVD in kaffeine, other in VLC and some Youtube videos in Firefox and they play sound just fine.

    However, If I press the mute or volume buttons, and the on-screen translucent indicator appears, theres a cracking noise.
    If i move the Kmix sliders, crackling noise. Pop up window, crackling noise and so on...
    BUT, not every time theres a noise. It sometimes its ok.

  9. #9
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    Default Re: Cracking sound trough speakers

    A mystery to me...
    I think you need a sound guru like @oldcpu
    Try not to fiddle too much for now.
    Tumbleweed_KDE
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  10. #10
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    Default Re: Cracking sound trough speakers

    Ok. I will wait for a while for other tips and suggestions.
    Thanks Carl!

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