Comment 37 for bug 1785171

I faced problems with I219-V too.
I have a dual boot with Windows 10 setup.
was getting 10mb/s Lan Link speed.
The problem is resolved (working for now... I think) am seeing 100mb/s Link speed

Had to go into BIOS and disable Windows specific features in Advanced mode
changed CSM -> UEFI (Dont know what these do)
and disabled Fast Boot

Thanks TJ (comment #17 above)
Havent tried changing the Power management inside Windows (will try that next.. If BIOS change doesnt work)

fingers crossed

Motherboard : MSI z390 Gaming pro carbon AC
Bios : something.130 (Jan2019 update)