Sonnet Twin 10g TB2 Adapter

[NiKiZe]

ok so it uses the intelx driver.

First, is there any chance that you could test this nic without the thunderbolt in a normal PC?
Just to verify if this is a possible TB issue or not.
If that isn't possible I would start building with DEBUG=intelx and see if that gives any leads
If not then move on to building with DEBUG=intelx:3 instead.