The comment #65 was what worked for me.
https://bugs.launchpad.net/ubuntu/+source/alsa-
driver/+bug/1840725/comments/65
My OS installation is Kubuntu 18.04.
Additional and more detailed info about my laptop:
```
$ uname -a
Linux ioku 5.3.0-59-generic #53~18.04.1-Ubuntu SMP Thu Jun 4 14:58:26 UTC 2020
x86_64 x86_64 x86_64 GNU/Linux
$ sudo dmidecode -t system
# dmidecode 3.1
Getting SMBIOS data from sysfs.
SMBIOS 3.1.1 present.
Handle 0x0012, DMI type 1, 27 bytes
System Information
Manufacturer: LENOVO
Product Name: 20QDCTO1WW
Version: ThinkPad X1 Carbon 7th
Serial Number: PF1E44X3
UUID: 06E257CC-238A-11B2-A85C-ECF7951B56CA
Wake-up Type: Power Switch
SKU Number: LENOVO_MT_20QD_BU_Think_FM_ThinkPad X1 Carbon 7th
Family: ThinkPad X1 Carbon 7th
Handle 0x0027, DMI type 12, 5 bytes
System Configuration Options
Handle 0x0037, DMI type 15, 31 bytes
System Event Log
Area Length: 1586 bytes
Header Start Offset: 0x0000
Header Length: 16 bytes
Data Start Offset: 0x0010
Access Method: General-purpose non-volatile data functions
Access Address: 0x00F0
Status: Valid, Not Full
Change Token: 0x00000062
Header Format: Type 1
Supported Log Type Descriptors: 4
Descriptor 1: POST error
Data Format 1: POST results bitmap
Descriptor 2: PCI system error
Data Format 2: None
Descriptor 3: System reconfigured
Data Format 3: None
Descriptor 4: Log area reset/cleared
Data Format 4: None
$ arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: sofsklhdacard [sof-skl_hda_card], device 0: HDA Analog (*) []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: sofsklhdacard [sof-skl_hda_card], device 1: HDA Digital (*) []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: sofsklhdacard [sof-skl_hda_card], device 6: DMIC32 (*) []
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: sofsklhdacard [sof-skl_hda_card], device 7: DMIC16 (*) []
Subdevices: 1/1
Subdevice #0: subdevice #0
```
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1840725
Title:
Microphone not working in Ubuntu 18.04.3 LTS on new hp-
spectre-x360-convertible-15 laptop
Status in alsa-driver package in Ubuntu:
Confirmed
Bug description:
Internal Microphone does not work in Ubuntu 18.04.3 LTS in a new hp-
spectre-x360-convertible-15 laptop. The microphone works perfectly on
Windows 10 (present in Dual boot mode).
Initially, Internal Microphone was not even detected but installing
alsa-tools-gui and overriding pin 0x12 to the Internal Microphone
fixed that issue. [Pin 0x13 does not work and causes static in a
headphone if it is plugged in.]
Microphone is not able to pick up any sound. I changed levels/settings in
alsamixer, pavucontrol without any success:
In alsamixer: Experimented with levels ranging from very low to very high for
Internal Mic, Capture, etc.
In pavucontrol: Set the Internal Mic as a fallback device, unlocked the
channels for the mic, experimented with reducing the level for one of the
channels (reduced right mic level to Silence while keeping the left mic level
normal/high and vice versa).
alsa-info:
http://alsa-project.org/db/?f=cf6d3ccc6372f955da7d99df07afbcb31d5a6c7f
arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC285 Analog [ALC285 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
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