[alsa-devel] Low sound and no mic in Lenovo Yoga / Ideapad S940 (Realtek ALC298)

[José Mesa Orihuela]

I have tested 3 differents linux distros (manjaro, ubuntu, popos) with 
the same results:

  * Low sound volume / ouput
  * No mic (seems detected but doesn't work)

This problem looks similar to C930. I have tried all the solutions (pin 
remapping, changing model...)  without success.

https://github.com/droserasprout/lenovo-yoga-c930-linux#speaker

Alsa-info.sh log:

http://alsa-project.org/db/?f=701015751be757989bb93d70a9a06f7e89d64e24

Linux lnx 4.19.66-1-MANJARO#1SMP PREEMPT Fri Aug 9 18:01:53 UTC 2019 
x86_64 GNU/Lin

More logs:

|00:1f.3 Multimedia audio controller [0401]: Intel Corporation Cannon 
Point-LP High Definition Audio Controller [8086:9dc8] (rev 30) |

|card 0: PCH [HDA Intel PCH], device 0: ALC298 Analog [ALC298 Analog] |

|snd_hda_codec_hdmi 69632 1 snd_sof_intel_hda_common 73728 1 sof_pci_dev 
snd_sof_intel_hda 20480 1 snd_sof_intel_hda_common snd_sof 118784 4 
snd_sof_intel_hda_common,snd_sof_intel_byt,snd_sof_intel_ipc,sof_pci_dev 
snd_hda_codec_realtek 126976 1 snd_hda_codec_generic 94208 1 
snd_hda_codec_realtek snd_soc_hdac_hda 24576 2 
snd_sof_intel_hda_common,snd_soc_skl ledtrig_audio 16384 2 
snd_hda_codec_generic,snd_hda_codec_realtek snd_hda_ext_core 36864 4 
snd_sof_intel_hda_common,snd_soc_hdac_hda,snd_soc_skl,snd_sof_intel_hda 
snd_soc_acpi_intel_match 28672 3 
snd_sof_intel_hda_common,sof_pci_dev,snd_soc_skl snd_soc_core 290816 4 
snd_sof,snd_sof_intel_hda_common,snd_soc_hdac_hda,snd_soc_skl 
snd_hda_intel 49152 8 snd_hda_codec 159744 5 
snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek,snd_soc_hdac_hda 
snd_hda_core 102400 10 
snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_hda_codec_realtek,snd_sof_intel_hda_common,snd_soc_hdac_hda,snd_soc_skl,snd_sof_intel_hda 
snd_hwdep 20480 1 snd_hda_codec snd_pcm 139264 11 
snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_sof,snd_sof_intel_hda_common,snd_soc_core,snd_soc_skl,snd_hda_core,snd_pcm_dmaengine 
snd 110592 25 
snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_compress,snd_soc_core,snd_pcm 
|

Any ideas to solve this problem?
Regards