Same thing here on my 2 yo Legion Y730. Sound-wise everything worked fine for 18 month when i was running ubuntu 18.10, then still good on 20.04.1 for a few weeks and about three weeks ago internal speakers stopped working (but sound works fine on headphones or bluetooth).
My kernel is 5.4.0-58 and sound chip Realtek ALC298.
Bios version : 8XCN24WW(V1.07)
Same thing here on my 2 yo Legion Y730. Sound-wise everything worked fine for 18 month when i was running ubuntu 18.10, then still good on 20.04.1 for a few weeks and about three weeks ago internal speakers stopped working (but sound works fine on headphones or bluetooth).
My kernel is 5.4.0-58 and sound chip Realtek ALC298.
Bios version : 8XCN24WW(V1.07)