☰

运行上次 Ubuntu 更新后丢失了 Wifi 连接

tag-icon • tag-icon wireless updates realtek secure-boot
运行上次 Ubuntu 更新后丢失了 Wifi 连接

我遇到了类似这篇文章中解释的问题：更新后 Wi-Fi 网络丢失

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

我的问题出现在上次更新之后，现在根本检测不到 Wifi。

这里有一些信息：

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

命令行参数：

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 命令：

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 ？

当我读到更新的 wifi 驱动程序的未签名版本可能会出现问题（我认为安全启动需要签名模块）后，我禁用了安全启动，但没有成功。

有人可以告诉我是否可以尝试这里建议的方法：https://medium.com/@vovaprivalov/fixing-problem-with-missing-wifi-adapter-on-ubuntu-18-04-dec50879a47e （我没有尝试过，因为我不确定这对我来说是否是相同的路径...不想让我的系统比现在更加崩溃！）

（对不起，我的英语不好）

答案1

您需要更新linux-firmware。18.04 repo 还没有该rtw88/rtw8822c_wow_fw.bin文件。

您可以安全地从 20.04 仓库安装linux-firmware，因为现在您拥有相同的固件。在终端中运行：

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

相关内容