merci raleur pour votre aide
Voici le retour de la commande :
[ 0.010437] ACPI: SSDT 0x00000000B9C2DD88 000141 (v02 INTEL HdaDsp 00000000 INTL 20160422)
[ 0.303616] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[ 2.425641] snd_hda_intel 0000:00:1f.3: enabling device (0100 -> 0102)
[ 2.432537] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[ 2.484867] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC891: line_outs=1 (0x21/0x0/0x0/0x0/0x0) type:line
[ 2.484868] snd_hda_codec_realtek hdaudioC0D0: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[ 2.484869] snd_hda_codec_realtek hdaudioC0D0: hp_outs=1 (0x17/0x0/0x0/0x0/0x0)
[ 2.484869] snd_hda_codec_realtek hdaudioC0D0: mono: mono_out=0x0
[ 2.484870] snd_hda_codec_realtek hdaudioC0D0: inputs:
[ 2.484870] snd_hda_codec_realtek hdaudioC0D0: Rear Mic=0x18
[ 2.484871] snd_hda_codec_realtek hdaudioC0D0: Headphone Mic=0x19
[ 2.484872] snd_hda_codec_realtek hdaudioC0D0: Headset Mic=0x1b
[ 2.484872] snd_hda_codec_realtek hdaudioC0D0: Line=0x16
[ 2.526338] input: HDA Digital PCBeep as /devices/pci0000:00/0000:00:1f.3/sound/card0/input6
[ 2.526698] input: HDA Intel PCH Rear Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input7
[ 2.526731] input: HDA Intel PCH Headphone Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input8
[ 2.526972] input: HDA Intel PCH Line as /devices/pci0000:00/0000:00:1f.3/sound/card0/input9
[ 2.527706] input: HDA Intel PCH Line Out as /devices/pci0000:00/0000:00:1f.3/sound/card0/input10
[ 2.527737] input: HDA Intel PCH HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input11
[ 2.527763] input: HDA Intel PCH HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input12
[ 2.528305] input: HDA Intel PCH HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input13
[ 2.528407] input: HDA Intel PCH HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input14
[ 2.528434] input: HDA Intel PCH HDMI/DP,pcm=10 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input15
[ 4.862295] usbcore: registered new interface driver snd-usb-audio
j'ai des enceintes en USB branché a l'arriere du PC et j'ai aussi essayé avec un casque sur la prise jack en facade