I have the exact same issue on Linux version 5.4.0-47-generic (buildd@lcy01-amd64-014) (gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2)), with Lenovo Legion 7 81YT. I tried the same things as everybody else and could not get these speakers to work. I am a bit confused because some specs I found online for the the Legion 7 mention ALC 3306 -https://psref.lenovo.com/syspool/Sys/PDF/Legion/Lenovo_Legion_7_15IMHg05/Lenovo_Legion_7_15IMHg05_Spec.pdf (could not find any driver related to it) Vs ALC 287 identified by alsamixer. Speakers work just fine on Windows 10.
I have the exact same issue on Linux version 5.4.0-47-generic (buildd@ lcy01-amd64- 014) (gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2)), with Lenovo Legion 7 81YT. I tried the same things as everybody else and could not get these speakers to work. I am a bit confused because some specs I found online for the the Legion 7 mention ALC 3306 -https:/ /psref. lenovo. com/syspool/ Sys/PDF/ Legion/ Lenovo_ Legion_ 7_15IMHg05/ Lenovo_ Legion_ 7_15IMHg05_ Spec.pdf (could not find any driver related to it) Vs ALC 287 identified by alsamixer. Speakers work just fine on Windows 10.