pomon But you didn't write if it helped. Does wifi work? Write for others with this problem to apply it or not.
We will have to wait for Mihail to respond to find out for sure.
However, I installed the RTL88x2bu driver (substituting "clone https://github.com/cilynx/rtl88x2bu.git" and replacing other references to "8821cu" with "rtl88x2bu") to test your instructions, and the instructions worked(1)(2). I assume that your instructions will work for other Realtek drivers missing from the kernel if the appropriate driver and git is identified.
=========================
(1) Ran the instructions using a Panda adapter to download and install, and then shut down, unplugged the Panda, plugged in the Cudy adapter with the RTL88x2bu driver, and restarted to see if the Cudy adapter worked. It did.
(2) NOTE: I used a clean, first-time Solus install on my test computer before updating from kernel 5.10 to 5.11 for this purpose, and, accordingly, did not have two kernels (current and previous) to contend with. As a result, I did not have to select a kernel, as suggested by the instructions in the thread I referenced. The Tomomi script (the script I used to install the Realtek previously) is set up to select a kernel, so I'm wondering if trying to install on an existing Solus installation (with two kernels) might require a command (e.g. "/lib/modules/<kernel version>/build") to select the appropriate kernel. I notice that you did not include a "select kernel" command in your instructions, so I'm assuming that linux-current is the default, which would almost always be the right kernel.
