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

user2545681

12/5/22, 9:23 AM

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

1157

1 + 3

updates

kernel

Tester

12/12/22, 4:10 PM

Please check whether this matches your problem: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-5.11/+bug/1939635

Ying Xiong

12/14/22, 1:41 PM

if I understand correctly, you see 88x2bu module listed in 5.8.0-63 but not in the new version 5.11.0-25. Have you checked if 88x2bu.ko file exists in the kernel module /lib/modules/5.11.0-25-generic/. tree? How did you install or get the Realtek driver? Did you build yourself using dkms tool or run a command such as sudo apt install realtek-module-xxxx?

user2545681

12/16/22, 7:51 AM

Understanding is (was) correct. But I did not do the other checks. I build and installed using dkms. Previous kernel updates went well - nothing to be done at all.

Score:1

Ubuntu

user2545681

12/16/22, 7:53 AM

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

0 + 0

Elon Musk

I sit in a Tesla and translated this thread with Ai:

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

TH: อแด็ปเตอร์ไร้สาย Realtek ไม่ทำงานหลังจากอัปเดตเป็นเคอร์เนล 5.11.0-25

RO: Adaptorul wireless Realtek nu funcționează după actualizarea la kernel 5.11.0-25

RU: Беспроводной адаптер Realtek не работает после обновления до ядра 5.11.0-25

VI: Bộ điều hợp không dây Realtek không hoạt động sau khi cập nhật lên kernel 5.11.0-25

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