Wireless Connection

[hackneydave]

I have a Dell Latitude D610 running Linux Lite 3.8. My primary network connection is through a USB NIC dongle. See output following:

Bus 001 Device 002: ID 0bda:8812 Realtek Semiconductor Corp. RTL8812AU 802.11a/b/g/n/ac WLAN Adapter
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 002: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

The performance on the RTL dongle is good but when the system starts BIOS also starts up a PCI card with the old Dell b/g wireless connection. At restart, both of the wireless connections start and internet access slows substantially.  I have to manually disconnect the Dell card so that the dongle works properly.

I tried to switch off the WIFI in BIOS but then it also disables the RTL adapter and there is no network connection. Short of removing the original Dell WIF card, is there a way to disable it at login so that I just use the USB RTL adapter?

Thanks for your help.