On 7/28/20 6:53 AM, Greg Woods wrote:
[root@seveneves sbin]# amixer -c0 sset 'IEC958 In - Output Jack' on amixer: Unable to find simple control 'IEC958 In - Output Jack',0
[root@seveneves sbin]# amixer -c1 sset 'IEC958 In - Output Jack' on amixer: Unable to find simple control 'IEC958 In - Output Jack',0
Let's see what "amixer -c0 scontents" gives.