ugh! 11.4 has been a bit of a pain. The broadcom driver, b44, for the
Broadcom 44xx/47xx, freezes my system. I cannot be the only victim of this faulty driver.
The driver is not for the WLAN, but rather for 10/100 ethernet on a Dell Insprion 1720 laptop.
Drivers can be a pain, but I’ve never heard of an old-school ethernet card on a Dell not working. Not since 2001, at least. Anyway - try posting to Hardware the driver guys may know more.