This bug was fixed in the package alsa-ucm-conf - 1.2.2-1ubuntu0.9
---------------
alsa-ucm-conf (1.2.2-1ubuntu0.9) focal; urgency=medium
* d/p/0028-rt715-don-t-initialize-obsolete-ADC-controls.patch
* d/p/0029-sof-soundwire-rt715-use-the-hw-volume-control.patch
* d/p/0030-rt715-add-the-missing-sof-prefix-to-the-hw-control-n.patch
Conditionally initialize the codec rt715 according to mixer names
(LP: #1936009)
-- Hui Wang <[email protected]> Wed, 14 Jul 2021 08:59:30 +0800
** Changed in: alsa-ucm-conf (Ubuntu Focal)
Status: Fix Committed => Fix Released
** Changed in: alsa-ucm-conf (Ubuntu Hirsute)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1936009
Title:
[SRU] The internal mic of Dell Precision 5750 can't record sound
Status in HWE Next:
New
Status in OEM Priority Project:
New
Status in alsa-ucm-conf package in Ubuntu:
Fix Released
Status in alsa-ucm-conf source package in Focal:
Fix Released
Status in alsa-ucm-conf source package in Hirsute:
Fix Released
Status in alsa-ucm-conf source package in Impish:
Fix Released
Bug description:
[Impact]
After upgrade the linux kernel, the mixer names of rt715 is changed, the
current alsa-ucm-conf will fail to initialize that codec, then users can't
record sound from internal mic since the internal mic is routed to the codec
rt715.
[Fix]
Backport 3 upstream commits, after applying these 3 commits, the ucm conf
file dosn't initialize the codec with hardcoded mixer names anymore, it will
check the existence of the mixer name first, then conditionally initialize the
codec.
[Test]
run 'alsactl init 1' on the precision 5750 with old and new kernel, there is
no error logs, use the internal mic to record sound, it could record
successfully.
[Where problems will occur]
The change only affects the rt715 codec, so far, that codec only connects to
the internal mic on Dell soundwire audio machines, so it could introduce
regression on the internal mic like users can't record sound via internal mic
anymore on the Dell soundwire audio machines. But this possibility is very low
since we already tested these 3 commits on different Dell soundwire audio
machines (latitude and precision). We tested it with old kernel and new kernel,
all worked well.
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