Hello,

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

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On 2/11/25 02:05, Janet C wrote:

Hello,

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.

Do you see anything in the logs (missing driver..)?

It can not hurt to update the FW.

--
John Doe

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Janet C wrote:

Hello,

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

i wonder if some power management is putting it to sleep
or some timer is timing out. maybe check bios settings for
power management, screen savers, etc.

they can all not play very well together. :( (you know
the old saying about too many chefs in the kitchen...)


songbird

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

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--- SoupGate-Win32 v1.05
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On 2/13/25 4:53 PM, Janet C wrote:

I've checked that my firmware is up-to-date and turned off all of the power management settings in the BIOS, but I'm still experiencing the same thing. Other suggestions are welcome!

Thanks,
Janet

did you tried to boot with a LiveUSB and test your internal microphone?

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Janet C <nonaggie@protonmail.com> writes:

Hello,

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.

It's interesting that my similar work laptop, Intel T16 gen 3 has a
similar problem in Windows. System goes to sleep, audio devices die,
meaning the Realtek audio device, internal speaker and mic are just gone
until reboot. Wouldn't mind that but this condition also has the effect
that bluetooth headsets are headphones only, i.e. no microphone.

You might check if it's sleep that kills your microphone.

--- SoupGate-Win32 v1.05
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On Tue, 11 Feb 2025 01:05:45 +0000
Janet C <nonaggie@protonmail.com> wrote:

Now the microphone works when I boot, but at some point, it stops
working until I reboot.

Try hibernating and then restarting the system.

I am having problems with a bluetooth device. I conjecture that doing
this requires that upon rebooting the kernel must re-initialize the
hardware.

--
Does anybody read signatures any more?

https://charlescurley.com
https://charlescurley.com/blog/

--- SoupGate-Win32 v1.05
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--- SoupGate-Win32 v1.05
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