This is an older laptop (thinkpad t420) so I thought it might be a dead or dyong ethernet port/controller. ...nope. i got gigE connection just fine when I booted into windows 10.
This used to work. The drivers in linux have degraded horribly since I bought this machine. Even my wifi is crippled to slow speeds (2mbps) now. I dont want to get rid of this computer because it works fine for everything else (win10 works fine) but what in the world happened to the driver support in linux?