[AVL-MXE 2020.12.03] internal microphone not working Thinkpad T14

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fretje
Posts: 1
Joined: Sat Feb 06, 2021 5:52 pm

[AVL-MXE 2020.12.03] internal microphone not working Thinkpad T14

Post by fretje »

Hello there :)

I recently bought a Thinkpad T14 laptop and installed the latest AVL-MXE distribution [AVL-MXE 2020.12.03] to it (real-time kernel), but the internal microphone doesn't work. The ALSA-mixer isn't giving any signal. When I boot the same machine into Windows 10, the microphone works without a problem. With my external audio interface (Scarlett 2i4) everything works fine, but I'd like to be able to unplug and still be able to have the possibility to quickly record musical ideas or participate in video conferences.

I searched quite a bit for the answer already, and found this post that seems interesting - although it's about arch linux, it suggests that there might be a kernel-level solution to this problem:

https://bbs.archlinux.org/viewtopic.php?id=257433

Can anybody help me? Thanks in advance!

ps: here are my kernel & hardware configuration & several /proc/asound/ infos:

-Version-
Kernel : Linux 5.9.1-rt20avl1 (x86_64)
Version : #1 SMP PREEMPT_RT Sat Oct 31 12:21:58 EDT 2020
C Library : GNU C Library / (Debian GLIBC 2.28-10) 2.28
Distribution : Debian GNU/Linux 10 (buster)

-Computer-
Processor : AMD Ryzen 5 PRO 4650U with Radeon Graphics
Memory : 7420MB (5504MB used)
Machine Type : Notebook
Operating System : Debian GNU/Linux 10 (buster)
OpenGL Renderer : AMD RENOIR (DRM 3.39.0, 5.9.1-rt20avl1, LLVM 10.0.0)
X11 Vendor : The X.Org Foundation
-Audio Devices-
Audio Adapter : HDA-Intel - HD-Audio Generic
Audio Adapter : HDA-Intel - HD-Audio Generic
Audio Adapter : USB-Audio - Scarlett 2i4 USB
-Input Devices-
AT Translated Set 2 keyboard
Video Bus
SynPS/2 Synaptics TouchPad
Power Button
Lid Switch
Sleep Button
Power Button
ThinkPad Extra Buttons
TPPS/2 Elan TrackPoint
HD-Audio Generic HDMI/DP,pcm:3
HD-Audio Generic HDMI/DP,pcm:7
HD-Audio Generic HDMI/DP,pcm:8
HDA Digital PCBeep
HD-Audio Generic Mic
HD-Audio Generic Headphone
Integrated Camera: Integrated C
ACPI Virtual Keyboard Device
EXPSM USB Billboard Device Keyboard
EXPSM USB Billboard Device Mouse
EXPSM USB Billboard Device System Control
EXPSM USB Billboard Device Consumer Control
Microsoft Basic Optical Mouse
Dell Dell USB Entry Keyboard
-Printers-
No printers found

/proc/asound/version:
Advanced Linux Sound Architecture Driver Version k5.9.1-rt20avl1.


/proc/asound/devices:

1: : sequencer
2: [ 0- 3]: digital audio playback
3: [ 0- 7]: digital audio playback
4: [ 0- 8]: digital audio playback
5: [ 0- 0]: hardware dependent
6: [ 0] : control
7: [ 1- 0]: digital audio playback
8: [ 1- 0]: digital audio capture
9: [ 1- 0]: hardware dependent
10: [ 1] : control
11: [ 2- 0]: digital audio playback
12: [ 2- 0]: digital audio capture
13: [ 2] : control
14: [ 2- 0]: raw midi
33: : timer

/proc/asound/cards:
0 [Generic ]: HDA-Intel - HD-Audio Generic
HD-Audio Generic at 0xfd3c8000 irq 106
1 [Generic_1 ]: HDA-Intel - HD-Audio Generic
HD-Audio Generic at 0xfd3c0000 irq 107
2 [USB ]: USB-Audio - Scarlett 2i4 USB
Focusrite Scarlett 2i4 USB at usb-0000:07:00.4-1.2, high speed

/proc/asound/pcm:
00-03: HDMI 0 : HDMI 0 : playback 1
00-07: HDMI 1 : HDMI 1 : playback 1
00-08: HDMI 2 : HDMI 2 : playback 1
01-00: ALC257 Analog : ALC257 Analog : playback 1 : capture 1
02-00: USB Audio : USB Audio : playback 1 : capture 1
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