FWIW, I installed Lubuntu 23.10 on my old HP TouchSmart 600.  Because of
this audio problem, I've been using bluetooth speakers.  Last week, I
plugged in some old computer speakers via the 3.5mm audio out.  For a
short instance, sound actually came out of the internal speakers.
Eventually, sound came out of the external speakers, and no longer the

I think Lubuntu uses PulseAudio by default, but ALSA seems to also be
installed.  I don't know why the internal speakers suddenly worked then
stopped, and I haven't figured out how to reproduce it.  Either way, bt
and audio out still works.

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  HP Touchsmart 600-1005xt No sound from Internal Speakers

Status in alsa-driver package in Ubuntu:

Bug description:
  Found there is no internal speaker output from hp touchsmart
  600-1005xt in all releases of Ubuntu 8.04 to 10.04LTS (64bit) with
  updated alsa-base (on in Lucid now). All outputs & inputs
  work except the Internal speakers. I Checked all alsamixer levels, I
  have also noticed the nodeid's it seem to be mapped 0x15 - 0x0d - 0x03
  (21 - 13 - 3) for internal speakers which gives same results (no
  audio) in osx Applehda.kext. The Headphone nodeid's of 0x14 - 0x0c -
  0x02 (20 - 12 - 2) seem to work in all Ubuntu Dists & OSx as well.
  Windows 7 Driver everything works of course. Is Bios sending wrong pin
  configs for internal audio? if so what would the resolution be?

  here is my alsa-information from alsa-info.sh attached, My only guess
  is the pin configs how do you change them in alsa driver & how could I
  get the correct ones if the bios was sending wrong pathmaps? I should
  also note I've tried most of the model flags in alsa-base.conf in the
  alc888 documentation & rebooted countless times, model=auto shows the
  internal speaker but sound comes out headphones plug.

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