This bug was fixed in the package alsa-ucm-conf - 1.2.4-2ubuntu6
---------------
alsa-ucm-conf (1.2.4-2ubuntu6) impish; urgency=medium
* d/p/0009-ucm2-Add-UCM-support-for-Dell-Desktop.patch
Add Realtek 4050 USB Codec front and rear profiles
for a Dell machine. (LP: #1956855)
-- Hui Wang <hui.w...@canonical.com> Sun, 09 Jan 2022 15:23:42 +0800
** Changed in: alsa-ucm-conf (Ubuntu Impish)
Status: Fix Committed => Fix Released
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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1956855
Title:
[SRU] alsa-ucm-conf: Add Realtek 4050 USB Codec profile for a Dell
machine
Status in HWE Next:
New
Status in alsa-ucm-conf package in Ubuntu:
Fix Released
Status in alsa-ucm-conf source package in Focal:
Fix Committed
Status in alsa-ucm-conf source package in Impish:
Fix Released
Status in alsa-ucm-conf source package in Jammy:
Fix Released
Bug description:
[Impact]
This Dell machine has dual Realtek 4050 USB Codecs as front and rear codec,
the front codec has speaker and headset, the rear codec has line-out audio
jack. Without UCM, the pulseaudio can't detect this two usb audio codec and the
audio can't work at all.
[Fix]
Backport a upstream patch, the patch adds the front and rear profiles in the
ucm, then pulseaudio will enable all audio devices in this machine.
[Test]
booting with patched ucm, open the gnome-sound-setting, we could see usb
speaker, usb headset and usb lineout, play sound to speaker, headset and
lineout, all worked well, record sound via headset, it could record the sound
correctly.
[Where problems could occur]
This SRU adds the new ucm files to a folder, in theory it will not introduce
regressions, but It adds a file USB-Audio.conf, it could make other ucm conf
files in the USB-Audio folder fail to parse, and make the P620 and WD15/19's
audio fail to work, but this possibility is very low, we already tested it and
no regression found so far.
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