Re: internal microphone stops working
On Mon, Feb 10, 2025 at 8:24 PM Janet C <nonaggie@protonmail.com> wrote:
>
> I'm running bookworm on a Thinkpad T14s Gen4 AMD and am having an issue with the internal microphone. Using the kernel from bookworm, the microphone doesn't work at all, so I installed kernel 6.12 from backports. Now the microphone works when I boot, but at some point, it stops working until I reboot. I haven't been able to find any pattern in when it stops working. And when it stops, it's still detected (for example, I see it in pavucontrol, and the configuration is unchanged) but it doesn't seem to register any input (in pavucontrol, the VU meter doesn't move, and I can't record audio in any applications). I'm using pipewire.
>
> Any suggestions for how I can go about diagnosing the issue? I've tried restarting pipewire and wireplumber, but that doesn't do anything; the only way I've found to get the microphone working again is to reboot.
>
> Below is the relevant output from pactl list cards; it's the same when the microphone is working and when it isn't working.
>
> Thanks for any ideas,
> Janet
>
> Card #45
> Name: alsa_card.pci-0000_c3_00.5-platform-acp_ps_mach
> Driver: alsa
> Owner Module: n/a
> Properties:
> api.acp.auto-port = "false"
> api.acp.auto-profile = "false"
> api.alsa.card = "2"
> api.alsa.card.longname = "LENOVO-21F8CTO1WW-ThinkPadT14sGen4"
> api.alsa.card.name = "acp63"
> api.alsa.path = "hw:2"
> api.alsa.use-acp = "true"
> api.alsa.use-ucm = "false"
> api.dbus.ReserveDevice1 = "Audio2"
> device.api = "alsa"
> device.bus = "pci"
> device.bus_path = "pci-0000:c3:00.5-platform-acp_ps_mach"
> device.description = "ACP/ACP3X/ACP6x Audio Coprocessor"
> device.enum.api = "udev"
> device.icon_name = "audio-card-analog-pci"
> device.name = "alsa_card.pci-0000_c3_00.5-platform-acp_ps_mach"
> device.nick = "acp63"
> device.plugged.usec = "2879455"
> device.product.id = "0x15e2"
> device.product.name = "ACP/ACP3X/ACP6x Audio Coprocessor"
> device.subsystem = "sound"
> sysfs.path = "/devices/pci0000:00/0000:00:08.1/0000:c3:00.5/acp_ps_mach/sound/card2"
> device.vendor.id = "0x1022"
> device.vendor.name = "Advanced Micro Devices, Inc. [AMD]"
> media.class = "Audio/Device"
> factory.id = "14"
> client.id = "33"
> object.id = "45"
> object.serial = "45"
> object.path = "alsa:pcm:2"
> alsa.card = "2"
> alsa.card_name = "acp63"
> alsa.long_card_name = "LENOVO-21F8CTO1WW-ThinkPadT14sGen4"
> alsa.driver_name = "snd_soc_ps_mach"
> device.string = "2"
> Profiles:
> off: Off (sinks: 0, sources: 0, priority: 0, available: yes)
> input:stereo-fallback: Stereo Input (sinks: 0, sources: 1, priority: 51, available: yes)
> pro-audio: Pro Audio (sinks: 0, sources: 1, priority: 1, available: yes)
> Active Profile: input:stereo-fallback
> Ports:
> analog-input: Analog Input (type: Analog, priority: 10000, latency offset: 0 usec, availability unknown)
> Properties:
> port.type = "analog"
> card.profile.port = "0"
> Part of profile(s): input:stereo-fallback
It looks like the latest BIOS for the T14s is dated January 22, 2025.
You might try updating the BIOS before you start trying to figure out
why power management or a driver is sideways.
Remember, the BIOS/UEFI is just another buggy piece of software that
needs updating. There's nothing special about it.
Jeff
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