microphone laptop lenovo

Hello,

I'm not so good in Linux, I have Mint on my principal laptop, and Slackware on the other, I've installed it following a book (I love it).

My microphone doesn't work on my laptop lenovo. I'm not so good in Linux, I have Slackware, I've installed it following a book (I love it).

I've installed alsa, but there is no improvement.

Can you help me, please to configure properly my microphone.

Here is some information:

1/ bash-4.3# lspci | grep [Aa]udio ; lsusb | grep [Aa]udio
00:1b.0 Audio device: Intel Corporation Atom Processor Z36xxx/Z37xxx Series High Definition Audio Controller (rev 0e)
bash-4.3# cat /proc/asound/pcm
00-00: CX20751/2 Analog : CX20751/2 Analog : playback 1 : capture 1
00-03: HDMI 0 : HDMI 0 : playback 1

2/**** Liste des Peripheriques Materiels PLAYBACK ****
carte 0: PCH [HDA Intel PCH], peripherique 0: CX20751/2 Analog [CX20751/2 Analog]
Sous-peripheriques: 1/1
Sous-peripherique #0: subdevice #0
carte 0: PCH [HDA Intel PCH], peripherique 3: HDMI 0 [HDMI 0]
Sous-peripheriques: 1/1
Sous-peripherique #0: subdevice #0

3/ bash-4.3# lspci
00:00.0 Host bridge: Intel Corporation Atom Processor Z36xxx/Z37xxx Series SoC Transaction Register (rev 0e)
00:02.0 VGA compatible controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display (rev 0e)
00:13.0 SATA controller: Intel Corporation Atom Processor E3800 Series SATA AHCI Controller (rev 0e)
00:1a.0 Encryption controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Trusted Execution Engine (rev 0e)
00:1b.0 Audio device: Intel Corporation Atom Processor Z36xxx/Z37xxx Series High Definition Audio Controller (rev 0e)
00:1c.0 PCI bridge: Intel Corporation Atom Processor E3800 Series PCI Express Root Port 1 (rev 0e)
00:1c.2 PCI bridge: Intel Corporation Atom Processor E3800 Series PCI Express Root Port 3 (rev 0e)
00:1c.3 PCI bridge: Intel Corporation Atom Processor E3800 Series PCI Express Root Port 4 (rev 0e)
00:1d.0 USB controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series USB EHCI (rev 0e)
00:1f.0 ISA bridge: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Power Control Unit (rev 0e)
00:1f.3 SMBus: Intel Corporation Atom Processor E3800 Series SMBus Controller (rev 0e)
02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)
bash-4.3# dmesg | grep snd
[ 11.725319] snd_hda_intel 0000:00:1b.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[ 12.081382] snd_hda_codec_conexant hdaudioC0D0: CX20751/2: BIOS auto-probing.
[ 12.082623] snd_hda_codec_conexant hdaudioC0D0: autoconfig for CX20751/2: line_outs=1 (0x17/0x0/0x0/0x0/0x0) type:speaker
[ 12.084529] snd_hda_codec_conexant hdaudioC0D0: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[ 12.086416] snd_hda_codec_conexant hdaudioC0D0: hp_outs=1 (0x16/0x0/0x0/0x0/0x0)
[ 12.088316] snd_hda_codec_conexant hdaudioC0D0: mono: mono_out=0x0
[ 12.090160] snd_hda_codec_conexant hdaudioC0D0: inputs:
[ 12.091984] snd_hda_codec_conexant hdaudioC0D0: Internal Mic=0x1a
[ 12.093841] snd_hda_codec_conexant hdaudioC0D0: Mic=0x19
[ 12.098825] snd_hda_codec_conexant hdaudioC0D0: Enable sync_write for stable communication
bash-4.3# lsmod |grep uvcvideo
uvcvideo 78423 0
videobuf2_vmalloc 5260 1 uvcvideo
videobuf2_v4l2 20079 1 uvcvideo
videobuf2_core 23494 2 uvcvideo,videobuf2_v4l2
videodev 157334 4 uvcvideo,v4l2_common,videobuf2_core,videobuf2_v4l2
bash-4.3# lsusb | grep snd
bash-4.3# lsusb | grep uvcvideo
bash-4.3# arecord -l
**** Liste des Peripheriques Materiels CAPTURE ****
carte 0: PCH [HDA Intel PCH], peripherique 0: CX20751/2 Analog [CX20751/2 Analog]
Sous-peripheriques: 1/1
Sous-peripherique #0: subdevice #0