Built-in microphone not detected (Yoga C930)

gnome
hardware
microphone

#1

Hi,

I have freshly installed Manjaro Gnome on a Yoga C930 and it seems that the built-in microphone is not detected, by this I mean that in the setting/sound/input nothing appear.
Apparently, I use the kernel: Linux 4.19.23-1.

If it can help here is what ‘arecord-l’ returns:

**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC298 Analog [ALC298 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

and what ‘pactl list sources’ returns

Source #0
	State: SUSPENDED
	Name: alsa_output.pci-0000_00_1f.3.analog-stereo.monitor
	Description: Monitor of Built-in Audio Analog Stereo
	Driver: module-alsa-card.c
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Owner Module: 6
	Mute: no
	Volume: front-left: 65536 / 100% / 0,00 dB,   front-right: 65536 / 100% / 0,00 dB
	        balance 0,00
	Base Volume: 65536 / 100% / 0,00 dB
	Monitor of Sink: alsa_output.pci-0000_00_1f.3.analog-stereo
	Latency: 0 usec, configured 0 usec
	Flags: DECIBEL_VOLUME LATENCY 
	Properties:
		device.description = "Monitor of Built-in Audio Analog Stereo"
		device.class = "monitor"
		alsa.card = "0"
		alsa.card_name = "HDA Intel PCH"
		alsa.long_card_name = "HDA Intel PCH at 0x2ffb018000 irq 151"
		alsa.driver_name = "snd_hda_intel"
		device.bus_path = "pci-0000:00:1f.3"
		sysfs.path = "/devices/pci0000:00/0000:00:1f.3/sound/card0"
		device.bus = "pci"
		device.vendor.id = "8086"
		device.vendor.name = "Intel Corporation"
		device.product.id = "9d71"
		device.product.name = "Sunrise Point-LP HD Audio"
		device.form_factor = "internal"
		device.string = "0"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card-pci"
	Formats:
		pcm

Source #1
	State: SUSPENDED
	Name: alsa_input.pci-0000_00_1f.3.analog-stereo
	Description: Built-in Audio Analog Stereo
	Driver: module-alsa-card.c
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Owner Module: 6
	Mute: no
	Volume: front-left: 10387 /  16% / -48,00 dB,   front-right: 10387 /  16% / -48,00 dB
	        balance 0,00
	Base Volume: 6554 /  10% / -60,00 dB
	Monitor of Sink: n/a
	Latency: 0 usec, configured 0 usec
	Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY 
	Properties:
		alsa.resolution_bits = "16"
		device.api = "alsa"
		device.class = "sound"
		alsa.class = "generic"
		alsa.subclass = "generic-mix"
		alsa.name = "ALC298 Analog"
		alsa.id = "ALC298 Analog"
		alsa.subdevice = "0"
		alsa.subdevice_name = "subdevice #0"
		alsa.device = "0"
		alsa.card = "0"
		alsa.card_name = "HDA Intel PCH"
		alsa.long_card_name = "HDA Intel PCH at 0x2ffb018000 irq 151"
		alsa.driver_name = "snd_hda_intel"
		device.bus_path = "pci-0000:00:1f.3"
		sysfs.path = "/devices/pci0000:00/0000:00:1f.3/sound/card0"
		device.bus = "pci"
		device.vendor.id = "8086"
		device.vendor.name = "Intel Corporation"
		device.product.id = "9d71"
		device.product.name = "Sunrise Point-LP HD Audio"
		device.form_factor = "internal"
		device.string = "front:0"
		device.buffering.buffer_size = "352800"
		device.buffering.fragment_size = "176400"
		device.access_mode = "mmap+timer"
		device.profile.name = "analog-stereo"
		device.profile.description = "Analog Stereo"
		device.description = "Built-in Audio Analog Stereo"
		alsa.mixer_name = "Realtek ALC298"
		alsa.components = "HDA:10ec0298,17aa3812,00100103 HDA:8086280b,80860101,00100000"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card-pci"
	Ports:
		analog-input-mic: Microphone (priority: 8700, not available)
	Active Port: analog-input-mic
	Formats:
		pcm

I have no idea what to do with that.
Thank you.


#2

There’s a Lenovo forum thread that discusses the mic issue.

TL/DR: Looks like Lenovo has to configure something in the BIOS for it to work. The latest BIOS update was released in January, and someone in that thread confirmed it didn’t fix the issue.

If any BIOS updates become available, you might want to give those a try. Unfortunately, I don’t think Lenovo offers BIOS update ISOs, so the only way to update the BIOS is using windows.

As a temporary workaround, the mic jack was confirmed working, but you’d need an external mic.


#3

OK. Thank you for the links!
I will give a try to the new BIOS version.