Sorry, I forgot something.

The current native module needs to be renamed first. Uninstall the dkms driver, rename it and reinstall as described:

Code:
sudo dkms remove alx_dkms -v cw20121003 --all
sudo rm -r /usr/src/alx_dkms-cw20121003
sudo mv $(modinfo alx | grep filen | awk {'print $2'}) $(modinfo alx | grep filen | awk {'print $2'}).bak
sudo depmod -a && sudo update-initramfs -u
Reinstallation:
Code:
sudo tar xvf 4987097-alx_dkms-cw20121003.tar.gz -C /usr/src
sudo dkms add alx_dkms -v cw20121003
sudo dkms build alx_dkms -v cw20121003
sudo dkms install alx_dkms -v cw20121003
sudo depmod -a && sudo update-initramfs -u
And reloading the driver as described. You better copy/paste these commands