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最近更新后，Ubuntu 20.04 上的以太网和 Wi-Fi 均无法正常工作

tag-icon • tag-icon drivers 20.04 wireless kernel ethernet
最近更新后，Ubuntu 20.04 上的以太网和 Wi-Fi 均无法正常工作

我最近使用 Ubuntu 20.04 对我的工作站进行了更新。Wi-Fi LAN 卡（我使用的是 iptime N150UA）和以太网连接均无法正常工作，并且两者似乎都未被检测到，如屏幕截图所示。我检查了 LAN 卡和以太网电缆在其他计算机上是否正常工作，并且当电缆也连接到工作站时，以太网指示灯会亮起绿色。

网络设置截图

我尝试过的一些故障排除日志如下：

~$ sudo lshw -c network
  *-network UNCLAIMED       
       description: Ethernet controller
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:03:00.0
       version: 15
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list
       configuration: latency=0
       resources: ioport:3000(size=256) memory:92104000-92104fff memory:92100000-92103fff

~$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever

~$ uname -r
5.15.0-1048-oracle

~$ lspci -nn | grep 0200
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 15)

~$ tail -f /var/log/syslog
Nov 27 12:22:18 thunder-desktop dbus-daemon[1376]: [session uid=1000 pid=1376] Activating via systemd: service name='org.gnome.Terminal' unit='gnome-terminal-server.service' requested by ':1.92' (uid=1000 pid=2375 comm="/usr/bin/gnome-terminal.real " label="unconfined")
Nov 27 12:22:18 thunder-desktop systemd[1364]: Starting GNOME Terminal Server...
Nov 27 12:22:19 thunder-desktop dbus-daemon[1376]: [session uid=1000 pid=1376] Successfully activated service 'org.gnome.Terminal'
Nov 27 12:22:19 thunder-desktop systemd[1364]: Started GNOME Terminal Server.
Nov 27 12:22:19 thunder-desktop systemd[1364]: Started VTE child process 2389 launched by gnome-terminal-server process 2378.
Nov 27 12:22:19 thunder-desktop systemd[1364]: gnome-launched-x-terminal-emulator-2372.scope: Succeeded.
Nov 27 12:22:20 thunder-desktop dbus-daemon[1376]: [session uid=1000 pid=1376] Activating service name='org.gnome.gedit' requested by ':1.37' (uid=1000 pid=1631 comm="/usr/bin/gnome-shell " label="unconfined")
Nov 27 12:22:20 thunder-desktop dbus-daemon[1376]: [session uid=1000 pid=1376] Successfully activated service 'org.gnome.gedit'
Nov 27 12:22:21 thunder-desktop gnome-shell[1631]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x20000f8
Nov 27 12:22:51 thunder-desktop gsd-color[1777]: unable to get EDID for xrandr-default: unable to get EDID for output

~$ sudo dmidecode -s bios-version
1401

我查看了类似的问题和答案（例如，https://www.linuxquestions.org/questions/linux-server-73/updated-system-all-networking-lost-following-reboot-4175690186/#post6218320) 这表明 grub 引导程序可能存在问题。虽然应该位于 /etc/default/grub 中的配置文件不存在。执行关机然后启动的冷启动对我来说不起作用，正如更新后有线连接停止工作（Realtek 以太网）-Ubuntu 20.04

非常感谢您的帮助！

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