i was able to fix this by googling for my brand / model of laptop and
'ubuntu'
ubuntu hp dv6 sound
there are numerous forums that list procedures to fix, typically by editing
/etc files
i did several of them and now it works.
this was added to /etc/modprobe.d/alsa-base.conf
alias snd-card-0 snd-hda-intel
alias snd-slot-0 snd-hda-intel
options snd-hda-intel model=dell-m4-3 enable_msi=1
and this was edited into /etc/pulse/default.pa (replacing the old udev
line)
load-module module-udev-detect tsched=0
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https://bugs.launchpad.net/bugs/930617
Title:
All videos on computer play at double speed with no sound.
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