If the Ethernet port Eth1 does not work after unplugging the Ethernet cable and restarting/shutting down, and on device manager, the network adapter i218 has a yellow sign (Error code 10 - Driver cannot start).
Follow the steps below to fix this issue:
- Insert an Ethernet cable on port Eth1, and restart.
- Download and install the Intel Network Adapter Driver through Intel's Download Center, the latest and the only version currently with the option to disable the Ultra Low Power mode is version 22.3. Download it for Windows 10, Windows 8.1 and for Windows 7. When a new driver is released, check that is validated for the i218, this is provided on the driver download page.
- When installing the driver, the device drivers and PROSet options should be checked, while the Intel Advanced Network Services should remain unchecked.
- Once the driver is installed, enter device manager -> navigate to the network adapters -> right click on i218 -> properties. On the power management tab, under power saver options scroll down and uncheck "Ultra Low Power Mode when the cable is disconnected" option. Finally, click OK.
The root cause of this issue is that the IPC2 Broadwell does not implement Ultra Low Power mode (connected standby).