I have a latest ubuntu armbian on a pinebook pro, I use an DUB-1312 gigabit to usb 3.0 for wired connection, I plug it in the usb 3 port of the pinebook but I run iperf I see the same speeds as the other usb 2 port.
$ iperf3 -c 192.168.0.34
Connecting to host 192.168.0.34, port 5201
[ 5] local 192.168.0.33 port 48140 connected to 192.168.0.34 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 41.7 MBytes 350 Mbits/sec 0 298 KBytes
(More thread only made results worst)
While the same DUB-1312 plugged in my amd64 ubuntu computer achieve 950Mb/s easly (capped by the other testing device (an odroid-hc1)).
Same thing for a random usb 3.1 key I have laying around (so its very unlikely a problem with the ethernet over usb driver).
It seems to me that the usb 3 port is only being used with usb 2.
Am I the only with this issue ?