I have a Wi-Fi adapter Realtek RTL8192CU. In Windows its speed is about 5-25 Mb/s. In Ubuntu it's only 100-200 Kb/s. So I entered the following commands as said:

sudo apt-get install git linux-headers-generic build-essential dkms
git clone
sudo dkms add ./rtl8192cu-fixes
sudo dkms install 8192cu/1.11
sudo depmod -a
sudo cp ./rtl8192cu-fixes/blacklist-native-rtl8192.conf /etc/modprobe.d/

After reboot I have no connection at all. How can I undo all these commands and turn back my default driver?

1 Answer

Please try:

sudo dkms remove 8192cu/1.11 --all
sudo rm /etc/modprobe.d/blacklist-native-rtl8192.conf

Reboot and check:

sudo dkms status

There should be no mention of 8192cu.

If you find that your wireless is still slow, check to see if you have two conflicting drivers loaded:

lsmod | grep rtl

You will probably find that both rtl8xxxu and rtl8192cu are loaded. Let's blacklist the least likely to succeed:

sudo -i
modprobe -r rtl8192cu
echo "blacklist rtl8192cu" >> /etc/modprobe.d/blacklist.conf
exit

Any improvement? It might take a reboot.

3

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