ubunt 16 and 18 slow wired networking

jason95

Hi,

I flashed the ubuntu firmware/boot.  Just a simple speedtest.net showed 10 Mbps - but the same network cable connected to my desktop pc showed almost 60 Mbps speed.  I tried the other os - the best is Android at 16 Mbps.  Anyone can help solve the slowness issue?  The router is 100 Mbps.

Thanks.

jason95

ps.  the board is roc-rk3328-cc
I tried the follow images - all showed slow wired networking
ROC-RK3328-CC_Android7.1.2_180411.img
ROC-RK3328-CC_Debian9-Arch64_20180425.img
ROC-RK3328-CC_Ubuntu16.04_Arch64_20180404.img
ROC-RK3328-CC-ubuntu18.04-LXDE_20180605.img