This bug was fixed in the package pulseaudio - 1:13.99.1-1ubuntu3.11
---------------
pulseaudio (1:13.99.1-1ubuntu3.11) focal; urgency=medium
* d/p/0016-check_off_profile_when_switching_profile.patch
* d/p/0017-add_dynamic_priority_bonus_base_for_alsa_profiles.patch
Fix a "Rear Mic" always showing on input list when using dual codec.
(LP: #1929371)
[ Hui Wang ]
* d/p/0704-alsa-mixer-use-safe-dB-range-values-when-the-overrid.patch
* d/p/0705-alsa-mixer-add-support-up-8-mixer-channels.patch
- The linux kernel 5.11 starts supporting more than 2 channels for
the digital mic, we need to add the support of 8 channels for a
single alsa mixer, otherwise the PA can't change the hardware input
volume of the digital mic.
(LP: #1929817)
-- Jeremy Szu <jeremy....@canonical.com> Tue, 25 May 2021 16:04:07
+0000
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https://bugs.launchpad.net/bugs/1929371
Title:
[SRU] there is always a "Rear Microphone - Built-in Audio" option on
the input device list even if the microphone is unplugged
Status in OEM Priority Project:
Triaged
Status in alsa-ucm-conf package in Ubuntu:
Fix Released
Status in pulseaudio package in Ubuntu:
Fix Released
Status in alsa-ucm-conf source package in Focal:
Fix Released
Status in pulseaudio source package in Focal:
Fix Released
Status in alsa-ucm-conf source package in Hirsute:
Fix Released
Status in pulseaudio source package in Hirsute:
Fix Released
Bug description:
[Impact]
In Lenovo P520, which using a codec for front panel, the other codec for rear
panel and both are on a same card.
In this case, the rear Mic will present on input devices of "Sound
Settings" even if attaching nothing to rear mic jack.
[Fix]
For alsa-ucm-conf part, the Mic 2 should use "Rear Mic Jack" as JackControl
because of
```
control.18 {
iface CARD
name 'Rear Mic Jack'
value true
comment {
access read
type BOOLEAN
count 1
}
}
```
After applying "Rear Mic Jack", the rear Mic will not always there anymore
but it's not there as well if hot-plugging audio device on rear mic. Thus, it
needs to change pulseaudio to handle if all devices are off cases.
For pulseaudio, if there is no any audio devices attached, then
attaching an input device on rear mic jack. The port will not be
selected automatically because the profiles is off. It needs patch
pulseaudio to check off profiles (for dual codec case).
[Test]
After applying these patches, the rear mic jack works good in all cases (boot
without mic and then attach mic, boot with mic and then hotplug it) and other
functions (line-in / line-out) work pretty well.
[Where problems could occur]
This change only apply the bonus on below cases:
```
if ((has_input_port && found_available_input_port && !has_output_port) ||
(has_output_port && found_available_output_port && !has_input_port) ||
(has_input_port && found_available_input_port && has_output_port &&
found_available_output_port))
```
and these cases have been tested.
If there are some complex codec design then it might cause problem but so far
we didn't see that.
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