I am using Gigabyte H170-H3DP motherboard with i5-6500 cpu, when the computer woke up from sleep, the intel 1219-V(2) ethernet card did't work, and changed to 10Mbps, could not receive any packet,until the next restart of the OS.
Using Win10 (Version1511) X64 with the latest update and Intel Network Adapter Driver V21.0 installed.
I tried to disable the power saving of the ethernet card, however it didn't work.
Thank you for the information. I can see the Platform power management is disabled, please enable this option and run a test to see if this make any difference. I would suggest you to contact Gigabyte* support as this is onboard NIC which integrated on the system, the board vendor knows the overall BIOS and platform setting better. Here is the website concerning support for OEM onboard NIC: