I just tested linux-image-unsigned-5.13.0-1005-oem after enabling focal-
purposed and can confirm the fix is merged there, all relevant fixes are
working fine.

I also noticed one more thing that the microphone boost in alsamixer is
untied to microphone volume now. Can change volume seperately and
increase/decrease boost separately really glad about this one as well.

Let me know if I should update the tag to 'verification-done-focal'. The
kernel version where the fix has landed seems very far off from ubuntu
current one, guess it will take very long to arrive officially.

Also, let me know about if this thread will remain non-closed till fixes
of both pulseaudio and kernel arrives officially in stable release this
way I will have somewhere to keep track.

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https://bugs.launchpad.net/bugs/1930188

Title:
  Acer Aspire 5 sound driver issues

Status in linux package in Ubuntu:
  New

Bug description:
  Hello,

  There seems to be lots of issues in sound driver for Acer Aspire
  A515-56-57XR with ALC255. I will list all of them below and what I
  have tried so far.

  1. Headphones appears always plugged in even if they are physically not
  2. When actually plugging in headset/earphones it does not auto switch from 
speakers/internal mic to headphones/headset microphone automatically and vice 
versa, have to manually switch everytime.
  3. External headset/earphones microphone won't work at all

  After, logs of trial and error I have found a temporary fix. This
  seems to use legacy intel drivers which solves all 3 issues mentioned
  above but the internal/dmic mic is completely gone (which seems
  intentional when using this). Both depreciated dmic_detect and
  dsp_driver works, I have been using dsp_driver for now as I need
  external microphone at any cost.

  End of /etc/modprobe.d/alsa-base.conf
  # Headset mic fix
  options snd-hda-intel dmic_detect=0 / options snd-intel-dspcfg dsp_driver=1
  options snd-hda-intel model=alc255-acer

  In another thread similar to this I got some support and at least
  fixed the external microphone without using the alsa-base.conf change
  in custom modified kernel. I will attach it here. Now, hoping to fix
  other issues as well slowly like making headphones unplugged when
  physically removing as well as auto switching like the legacy driver
  one.

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