DA100 Gigabit LAN

[stst]

Hi,

I bought a Dell DA100 to have a Gigabit LAN port on my Inspiron Notebook. This works fine for Windows however in Linux (which is my preferred OS) it connects only with 100MBit/s.
Is there a way to tell DA100 to switch LAN to 1000MBit/s or does the linux driver not support it?

thanks,
Stefan