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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1899764 Title: [Realtek ALC257][Lenovo T14 Gen1] Internal mic or headset mic not detected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1899764/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
