Comment 5 for bug 1757191

It looks like this happened perhaps sometime between 4.10 and 4.13:

4.4.0-112: https://certification.canonical.com/hardware/201802-26096/submission/127640/
Driver: ixgbe (ver: 4.2.1-k)
Shows proper speed for both ports

4.10.0-42: https://certification.canonical.com/hardware/201712-26025/submission/125481/
Driver: ixgbe (ver: 4.4.0-k)
Shows proper speed for both ports

4.13.0-37: https://certification.canonical.com/hardware/201803-26156/submission/128508/
Driver: ixgbe (ver: 5.1.0-k)
Shows -1 for second port

4.16.0-041600rc6 (tester sent via email)
Driver version unknown
Shows -1 for second port