I have a Wi-Fi adapter Wi-Fi adapter Realtek RTL8192CU. However, I am getting very slow speed, like ~0,5 mbit.
How do I solve the issue?
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There's no need to install any drivers from GitHub (it won't work).
The problem is that the system has two drivers. (rtl8xxxu and rtl8192cu) Old one (rtl8192cu) should be turned off to turn on a new one (rtl8xxxu) that is already built into the Linux kernel.
Let's see it:
lsmod | grep rtl
Let's blacklist the last one:
sudo -i modprobe -r rtl8192cu echo "blacklist rtl8192cu" >> /etc/modprobe.d/blacklist.conf exit
Then restart your system: