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Yes, but I still could not install the driver that I download from the official web to the Ubuntu system It's a source code document and I couldn't do ./configure after I tried to use the command: make it gives me error: implicit declaration of function ‘daemonize’ [-Werror=implicit-function-declaration]

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I suspect that you tried to install a different driver because your device won’t connect. However, this circa-2011 driver won’t compile in any recent Ubuntu version.

I suspect that the required driver is already included in all recent Ubuntu versions. You can check from the terminal:

lsmod | grep rtl

If you find that both rtl8192cu and rtl8xxxu are loaded, then blacklist one:

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

You will probably also need a change to Network Manager:

sudo nano /etc/NetworkManager/NetworkManager.conf

Add a new section as follows:

[device]
wifi.scan-rand-mac-address=no

Proofread carefully, save and close the text editor.

After making these changes, reboot and let us hear the result.

chili555
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