Lost my Wifi connection after running last ubuntu update

I have a problem like the one explain in this post : wifi networks lost after updating

I don't know how to solve it. I use Ubuntu 18.04.4 LTS on a Lenovo ThinkPad E15 with a dual boot (windows/Ubuntu).

My problem occur after my last update and now, no Wifi detected at all.

Here some info :

uname :

michel@michel-ThinkPad-E15:~$ uname -a

Linux michel-ThinkPad-E15 5.4.0-42-generic #46~18.04.1-Ubuntu SMP Fri Jul 10 07:21:24 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

rfkill :

michel@michel-ThinkPad-E15:~$ rfkill list all

0: tpacpi_bluetooth_sw: Bluetooth
   Soft blocked: yes
   Hard blocked: no
2: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no

lspci :

michel@michel-ThinkPad-E15:~$ lspci -nnk | grep 0280 -A3

05:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:c822]
Subsystem: Lenovo Device [17aa:c123]
Kernel driver in use: rtw_pci
Kernel modules: rtwpci

nmcli :

michel@michel-ThinkPad-E15:~$ nmcli dev wifi list

IN-USE  SSID  MODE  CHAN  RATE  SIGNAL  BARS  SECURITY
michel@michel-ThinkPad-E15:~$ dmesg | grep -e rtw
[    3.846786] rtw_pci 0000:05:00.0: enabling device (0000 -> 0003)
[    3.846812] rtw_pci 0000:05:00.0: Direct firmware load for rtw88/rtw8822c_wow_fw.bin failed with error -2
[    3.846814] rtw_pci 0000:05:00.0: failed to request firmware
[    3.847210] rtw_pci 0000:05:00.0: Firmware version 5.0.0, H2C version 14
[    4.108806] rtw_pci 0000:05:00.0 wlp5s0: renamed from wlan0
[    4.922547] rtw_pci 0000:05:00.0: failed to wait firmware completion
[    4.931715] rtw_pci 0000:05:00.0: failed to wait firmware completion
[    4.935412] rtw_pci 0000:05:00.0: failed to wait firmware completion
[   15.015312] rtw_pci 0000:05:00.0: failed to wait firmware completion
[   15.019406] rtw_pci 0000:05:00.0: failed to wait firmware completion
[   25.020507] rtw_pci 0000:05:00.0: failed to wait firmware completion
[   25.024711] rtw_pci 0000:05:00.0: failed to wait firmware completion
[   35.023713] rtw_pci 0000:05:00.0: failed to wait firmware completion
[   35.027775] rtw_pci 0000:05:00.0: failed to wait firmware completion
[   45.016491] rtw_pci 0000:05:00.0: failed to wait firmware completion
[   45.020322] rtw_pci 0000:05:00.0: failed to wait firmware completion
[   55.021730] rtw_pci 0000:05:00.0: failed to wait firmware completion
[   55.025759] rtw_pci 0000:05:00.0: failed to wait firmware completion
[  319.399719] rtw_pci 0000:05:00.0: failed to wait firmware completion
[  319.404033] rtw_pci 0000:05:00.0: failed to wait firmware completion 

Can anyone help me ?

I have disable my secureboot after i read that it can be a problem with unsigned version of an updated wifi driver (secureboot need signed module i think), but no success for me.

Can anyone say me if i can try what is proposed here : https://medium.com/@vovaprivalov/fixing-problem-with-missing-wifi-adapter-on-ubuntu-18-04-dec50879a47e (i have don't try it cause i am not sure it's the same path for me ... don't want to crash my system more than now !)

(sorry for my bad english)

3
задан 26 July 2020 в 17:13

1 ответ

Вам необходимо обновить linux-firmware . В репо 18.04 еще нет файла rtw88 / rtw8822c_wow_fw.bin .

Вы можете безопасно установить linux-прошивку из репо 20.04, потому что теперь у вас есть то же самое прошивка. Запустите в терминале:

wget http://mirrors.kernel.org/ubuntu/pool/main/l/linux-firmware/linux-firmware_1.187.2_all.deb
sudo dpkg -i linux-firmware_1.187.2_all.deb
1
ответ дан 30 July 2020 в 22:02

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