engr_john

Asked: 2019-07-13 03:24:20 +0800 CST2019-07-13 03:24:20 +0800 CST 2019-07-13 03:24:20 +0800 CST

Turning up built-in speakers in Ubuntu

I am wondering how to turn on the built-in speaker DELL Optiplex 990 in Ubuntu.