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升级 Ubuntu 20.04 后出现 wifi 问题

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升级 Ubuntu 20.04 后出现 wifi 问题

我在 Raspberry 4 Model B 上安装了 ubuntu LTS 20.04 服务器，并且我测试了 wifi，它运行良好，但是当我升级 ubuntu 时，升级后 wifi 无法使用，你知道这个问题吗？

先感谢您。

答案1

我会这么做：

  • ls /lib/systemd/system/NetworkManager.service

再次检查输出是否未找到

  • 如果文件不存在，请重新添加服务单元
[Unit]
Description=Network Manager
Documentation=man:NetworkManager(8)
Wants=network.target
After=network-pre.target dbus.service
Before=network.target 

[Service]
Type=dbus
BusName=org.freedesktop.NetworkManager
ExecReload=/usr/bin/busctl call org.freedesktop.NetworkManager /org/freedesktop/NetworkManager org.freedesktop.NetworkManager Reload u 0
#ExecReload=/bin/kill -HUP $MAINPID
ExecStart=/usr/sbin/NetworkManager --no-daemon
Restart=on-failure
# NM doesn't want systemd to kill its children for it
KillMode=process
CapabilityBoundingSet=CAP_NET_ADMIN CAP_DAC_OVERRIDE CAP_NET_RAW CAP_NET_BIND_SERVICE CAP_SETGID CAP_SETUID CAP_SYS_MODULE CAP_AUDIT_WRITE CAP_KILL CAP_SYS_CHROOT

ProtectSystem=true
ProtectHome=read-only

[Install]
WantedBy=multi-user.target
Also=NetworkManager-dispatcher.service

# We want to enable NetworkManager-wait-online.service whenever this service
# is enabled. NetworkManager-wait-online.service has
# WantedBy=network-online.target, so enabling it only has an effect if
# network-online.target itself is enabled or pulled in by some other unit.
Also=NetworkManager-wait-online.service

保存到NetworkManager.service

  • 跑步sudo mv NetworkManager.service /lib/systemd/system/
  • 使用启动服务systemctl start NetworkManager.service

然后更新升级。

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