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USB 3 capped to USB 2 speed on pinebook pro




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
Connecting to host, port 5201
[  5] local port 48140 connected to 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 ?

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