I propose a workaround (which is not very elegant)
When you are using a kernel 5.0.0.21 or higher
sudo modprobe -r r8822be rtwpci
sudo modprobe r8822be rtwpci
In this case, you recover the wifi
and if you type
lspci -nnk | grep 0280 -A3
you will see
03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8822BE
802.11a/b/g/n/ac WiFi adapter [10ec:b822]
Subsystem: AzureWave RTL8822BE 802.11a/b/g/n/ac WiFi adapter [1a3b:2950]
Kernel driver in use: r8822be
Kernel modules: rtwpci, r8822be
If you try the same command before this trick I obtain
Kernel driver in use: rtw_pci
By changing the loading order of the modules, the wifi works again.
IF you know a more elegant way to load the modules, I am very interested
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https://bugs.launchpad.net/bugs/1838133
Title:
realtek r8822be kernel module fails after update to linux kernel-
headers 5.0.0-21
Status in linux package in Ubuntu:
Triaged
Bug description:
On July 24th I upgraded to the latest linux-headers-5.0.0-21 as part
of the dist-upgrade for latest packages in Disco Dingo 19.04. I didn't
notice that wifi was no longer working because at work I exclusively
use a wired Ethernet connection.
Today, however, when I tried to use my realtek r8822be wireless card,
I discovered that it was totally unresponsive and did not work with
wpa_supplicant / wpa_cli even when invoked manually from the command
line (let alone with NetworkManager). When the problem occurred, I was
using 19.04's latest kernel 5.0.0-21.
I then rebooted and selected kernel 5.0.0-20 from GRUB menu. "uname
-a" shows that I am using the previous kernel version:
Linux pj 5.0.0-20-generic #21-Ubuntu SMP Mon Jun 24 09:32:09 UTC 2019
x86_64 x86_64 x86_64 GNU/Linux
With this kernel version as well as linux-headers-5.0.0.20, linux-
headers-5.0.0-20-generic, my realtek wireless card works fine. While
booted into 5.0.0-20 kernel, here are the realtek kernel modules that
are loaded:
# lsmod | grep r8
r8822be 692224 0
mac80211 806912 1 r8822be
cfg80211 671744 2 mac80211,r8822be
r8169 81920 0
Hopefully this realtek wireless regression can get fixed in the next
minor kernel version. Let me know if you need any more information.
Best Regards,
Jun
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