[Bug 1868210] Please test proposed package

[Brian Murray]

Hello Anthony, or anyone else affected,

Accepted alsa-lib into bionic-proposed. The package will build now and
be available at https://launchpad.net/ubuntu/+source/alsa-
lib/1.1.3-5ubuntu0.5 in a few hours, and then in the -proposed
repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
bionic to verification-done-bionic. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-bionic. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

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https://bugs.launchpad.net/bugs/1868210

Title:
  [SRU] Load ucm on Lenovo notebooks based on bios version

Status in HWE Next:
  New
Status in alsa-lib package in Ubuntu:
  Invalid
Status in alsa-lib source package in Bionic:
  Fix Committed
Status in alsa-lib source package in Eoan:
  Fix Committed
Status in alsa-lib source package in Focal:
  Invalid

Bug description:
  This SRU is not backported from upstream of alsa-lib and this SRU is
  not going to be submitted to upstream. That is because the latest
  alsa-lib already supports ucm2, and with ucm2 all machines could share
  one ucm, so latest alsa-lib does not have this problem. This problem
  is only specific to the alsa-lib in Bionic and Eoan.

  [Impact]
  On some Lenovo notebooks, UCM files are not loaded and mic can't be used.

  [Fix]
  UCM was loaded based on cardlongname, but that can't cover all configs of the same model. Lenovo suggested to load  ucm by the first 3 letters of /sys/devices/virtual/dmi/id/bios_version, so that all configs could use just one ucm.

  [Test Case]
  After applying this patch, install the testing alsa-lib on Lenovo X1C7 and Dell vostro 5390, which are all machines with the DMIC connected to PCH. After system bootup, check the /usr/share/alsa/ucm/ for the presence of LENOVO-BIOSID-xxx directories.

  Lenovo X1C7 should load the N2H/*.conf and verify the audio
  functionalities. The Dell machine should still load the ucm by
  cardname, and it should work as good as before.

  [Regression Potential]
  low, just add some new UCMs and let Lenovo machine find the UCM by bios_version if it fails by cardlongname. I've already tested the change on Lenovo and Dell machines.

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