Ubuntu 16.04: Sound and video problems - Ask Ubuntu


i updated ubuntu 16.04 while ago , haven't gotten sound work ever since. oddly enough, there's sound when start computer, none afterwards. there no sound output devices detected:

(click image)

in addition, @ point, volume indicator disappeared task bar, , there's no check box in sound settings put back.

when run aplay -i, nothing appears. @ 1 point, tried suggested in this article on unixmen.com, including unmuting in alsamixer, reinstalling alsa , pulseaudio, , updating sound drivers (although i'm really, worried might have made problem worse), , got sound work while, when restarted later, stopped working again.

how can fix this?

please let me know if there's other information can provide - problem has been plaguing me past few months.

  • the command display soundcards aplay -l not aplay -i
  • as there sound @ startup , try disable speech-dispatcher running
    sudo update-rc.d -f speech-dispatcher remove
    , reboot
  • if no luck, disable pulseaudio testing, can check if underlaying alsa driver works fine. run 3 commands::
    mkdir ~/.pulse
    echo autospawn=no > ~/.pulse/client.conf
    pulseaudio -k
    audio softwares use alsa: test sound (check volumes , mute using alsamixer or install "alsamixergui ").
    if ok, pulseaudio broken : reset with
    mv ~/.config/pulse ~/.config/pulseold
    echo autospawn=yes > ~/.pulse/client.conf
    pulseaudio
    launch pulseaudio new configuration ,test again.

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