Anybody got eth3 working? I tried to connect it with Turris Omnia with SFP+ direct attached cable and while Omnia sees the cable, MACCHIATObin is just dead, without any message in serial console about interface going up or down.
I have the same problem, in ubuntu my 10G ports are always in “UP” state, but the switch does not recognize them being plugged in. the 2.5G plug is always in “DOWN” state, but the switch sees it plugged in.
Did you ever figure it out? For not I can only use my 1G port, kinda silly.