No, I haven't tried the old driver. And it sounds also a strange that I can install the driver successful, but still be incomplete. So far I have been trust to Intel on these things, but you are right you never know...
But as I mentioned, somehow I would like to see more information about the reason why the driver does not start? Can I add somekind logging for the driver which offers better understand of the issue. Or perhaps says: "This NIC is broken..".
If it is so, that I have to travel in dark, It is sad to see that new drivers are coming all the time, but still the problem like this is unresolvable.
In case these helps...
Both ports/NICs were part of the same team. Now when I go to see the "Locally Administered Address" on both NICs that is empty. Also the "use default" -button will not bring any default values.
I know, when you have team the MAC address is flying from NIC to NIC, but could there be something which block to setup the MAC addresses?