运行最后一次 ubuntu 更新后丢失了我的 Wifi 连接

我有一个问题，就像这篇文章中解释的那样：更新后wifi网络丢失

我不知道如何解决它。我在具有双启动（Windows/Ubuntu）的联想 ThinkPad E15 上使用 Ubuntu 18.04.4 LTS。

我的问题发生在我上次更新之后，现在根本没有检测到 Wifi。

这里有一些信息：

姓名：

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

射频杀：

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 

谁能帮我 ？

在我读到更新的 wifi 驱动程序的未签名版本可能是问题后，我禁用了我的安全启动（我认为安全启动需要签名模块），但对我来说没有成功。

如果我可以尝试这里提出的建议，谁能告诉我：https ://medium.com/@vovaprivalov/fixing-problem-with-missing-wifi-adapter-on-ubuntu-18-04-dec50879a47e （我没有'不要尝试，因为我不确定这对我来说是不是同一条路……不想让我的系统比现在更崩溃！）

（对不起，我的英语不好）