802.1X authentication: working in windows enviorment, but in linux?

Hi!

I've setup a freeradius server on a virtual machine in ubuntu enviorment, and i'm using a cisco SG350-10-K9 Switch. I've got 802.1x authentication working on 2 different PC:s in windows enviorment. But when i setup linux VM:s i those and try to use that i get to enter my password, then i have to reenter it a couple of times before it turns off the network interface.

I've check the logs in both the switch and in the server. The switch gets the requests and the server shows nothing.

So, is there a know issue that it doesn't work in Linux? (although i googled it and couldn't find anything) or do i have to do something special?