After inserting discrete graphic card, the i219-v does not work anymore. Clean install of mojave did not help. Here some info:
romk-ukis-iMac:~ romk-uki$ kextstat | grep -i intel
62 0 0xffffff7f8240f000 0x14000 0x14000 com.insanelymac.IntelMausiEthernet (2.4.1d1) 88E228F4-3264-385C-84E9-3B7F99112336 <16 13 6 5 3 1>
89 0 0xffffff7f82561000 0x2000 0x2000 com.apple.driver.AppleIntelSlowAdaptiveClocking (4.0.0) DBB6E586-748A-39E2-BC59-9748D8E395A2 <88 5 3>
96...
Intel Ethernet i219-V does not work
romk-ukis-iMac:~ romk-uki$ kextstat | grep -i intel
62 0 0xffffff7f8240f000 0x14000 0x14000 com.insanelymac.IntelMausiEthernet (2.4.1d1) 88E228F4-3264-385C-84E9-3B7F99112336 <16 13 6 5 3 1>
89 0 0xffffff7f82561000 0x2000 0x2000 com.apple.driver.AppleIntelSlowAdaptiveClocking (4.0.0) DBB6E586-748A-39E2-BC59-9748D8E395A2 <88 5 3>
96...
Intel Ethernet i219-V does not work