Created attachment 854124 [details] According comment 37 and 41 enclosed the 4 Files named according points 3,4,7,8 I recognized in point 4 that the pavucontrol still showed unplugged even the headphone on front was plugged. To point 5: After disconnecting headphone there is still no sound on LINEOUT plug. pavucontrol shows LINEOUTPUT (plugged in). After setting pavucontrol to headphone (unplugged) I got sound to the amplifier again. It's the same for point 7 and 8