On Tue, Nov 20, 2018 at 09:10:22PM +0100, Bjørn Mork wrote: > Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> writes: > > > I do not see any USB networking device here at all. > > No, It wasn't easy to see. But it's there both with and without the > feature enabled: > > /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M > | Port 4: Dev 10, If 0, Class=Hub, Driver=hub/7p, 5000M > |__ Port 2: Dev 11, If 0, Class=Vendor Specific Class, Driver=r8152, 5000M Ah, sorry, I missed that. > This feature is only for convenience and should never prevent the > network from working. Unless the other end is confused by seeing the > same mac address on two ports... Better take down or disconnect the > undocked interface after docking. Ok, so it seems that this driver does not support the pass-through option for some reason. Mario, any ideas what Frédéric can do here to help debug the issue? He has some Dell hardware that does not seem to be working properly with the pass-through option. I place odds that the driver needs some kind of update for newer device signatures, which is what some of us worried about a long time ago when this patch first went in... thanks, greg k-h