Realtek wireless adapter not working after update to kernel 5.11.0-25

Question

I am facing networking issue when kernel updated on my 20.04 LTS from 5.8.0-63 to 5.11.0-25. All worked fine in 5.8.0-63. After update, the wifi networking is not available at all. I am running a VMWare installation with a tp-link wifi usb stick.

I tried steps from here. I did sudo apt install linux-modules-extra-5.11.0-25-generic and sudo apt install --reinstall linux-generic.

sudo modprobe iwlwifi shows no output at all.

In 5.8.0-63 lshw -c network shows

  *-network
       description: Wireless interface
       physical id: 2
       bus info: usb@1:1
       logical name: wlxd037********
       serial: d0:37:**:**:**:**
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=rtl88x2bu driverversion=5.8.0-63-generic ip=192.168.2.122 multicast=yes wireless=IEEE 802.11AC

and lsmod comes with

li@nux:~$ lsmod|grep 88
nls_iso8859_1          16384  1
snd_pcm               114688  3 snd_usb_audio,snd_ac97_codec,snd_ens1371
88x2bu               2904064  0
cfg80211              778240  4 88x2bu,iwlwifi,mac80211,rtl8xxxu
drm_kms_helper        217088  1 vmwgfx

So, 88x2bu is not loaded by cfg80211. What do I need to do?

Best, Holger

Answer 1

I got a hint to use RinCat driver. I installed successfully according to the description (again compile & dkms). DONE.