我用的是官方ubuntu20.04的镜像，如何让3.5mm port输出声音？我试了alsa找不到chip，用speaker-test测试，也没有声音。
I use the image of the official Ubuntu 20.04. How can I make the 3.5mm port output sound? I tried alsa, it couldn’t find the chip. I tried to use “speaker-test” but there was no sound.