After further investigations, the problem could come from the computer itself.
I finished my distro / kernel tests with a windows installation, and I discovered that the mic is still unavailable... Sorry for the inconvenience, I think you can close this ticket. I am going to bring in the on-site support to fix the problem on window, before going further on the linux side. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1899764 Title: [Realtek ALC257][Lenovo T14 Gen1] Internal mic or headset mic not detected Status in alsa-driver package in Ubuntu: Incomplete Bug description: Hello, I've received a brand new Lenovo T14 Gen 1 (Intel), that suffers of some incompatibilities with Ubuntu. The internal mic is not detected (only analog input is displayed). And when a headset is plug, only the output works. I've tried lots of alsa-base.conf snd-hda-intel overrides without success. Tested on U18 and U20. > uname -a Linux julien-ThinkPad-T14-Gen-1 5.9.0-050900-generic #202010112230 SMP Sun Oct 11 22:34:01 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux (tried with stock kernel and kernel-oem too) > arecord -l **** Liste des Périphériques Matériels CAPTURE **** carte 0: PCH [HDA Intel PCH], périphérique 0: ALC257 Analog [ALC257 Analog] Sous-périphériques: 1/1 Sous-périphérique #0: subdevice #0 carte 0: PCH [HDA Intel PCH], périphérique 2: ALC257 Alt Analog [ALC257 Alt Analog] Sous-périphériques: 2/2 Sous-périphérique #0: subdevice #0 Sous-périphérique #1: subdevice #1 > cat /proc/asound/card0/codec\#0 https://gist.github.com/julienlafont-tabmo/4ba9311bbb1d3d918532279d7578ba28 > hdajackretask (default configuration) - Internal speaker Ox14 - Black headphone, Right Side, 0x21 - All others: not connected > alsa-info http://alsa-project.org/db/?f=a5af631628bef97a85cace2574b7c6694037130a > alba-base.conf settings tried without success: options snd-hda-intel model=laptop-dmic -- options snd-hda-intel dmic_detect=0 options snd-hda-intel index=0 model=laptop-dmic -- options snd-hda-intel dmic_detect=0 options snd-hda-intel index=1 model=laptop-dmic -- options snd-hda-intel model=auto -- options snd-hda-intel model=headset-mic Do you have some idea to make the mic working? Bests, To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1899764/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
