Hello, I am using 'Centos 7.8.2003 (Core)' and after an update, a week or two ago, all system sounds seemed to have stopped working. Sound in firefox still works, and also rhythmbox seems to play music files, VLC player do too. It seems that just things like notifications etc are not woring anymore. Also, the "test speakers" in the sound setup doesn't seem to produce any sound. any ideas? thanks, Ron