有线网络 - 升级到 17.04 后设备不受管理

Question

升级到 17.04 后，我无法通过网络管理器连接到有线以太网。指示器网络说：以太网 - 设备未管理。系统设置 > 网络 > 有线显示：有线非托管。

Wifi 连接运行良好，通过 ifup/ifdown 管理的有线连接也运行良好（当我将 eth0 放在 /etc/network/interfaces 中时）。

我的网络配置文件如下所示：

$ cat /etc/network/interfaces

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

$ cat /etc/NetworkManager/NetworkManager.conf

[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=true

这是我的 ifconfig -a 输出：

docker0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 172.17.0.1  netmask 255.255.0.0  broadcast 0.0.0.0
        ether 02:42:1c:34:04:c4  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth0: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 54:be:f7:76:35:32  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 18  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 352  bytes 25966 (25.9 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 352  bytes 25966 (25.9 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlan0: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 7e:de:d9:4c:d6:4f  txqueuelen 1000  (Ethernet)
        RX packets 2170  bytes 1604327 (1.6 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2108  bytes 416467 (416.4 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Answer 1

正如Zoltan Laczko 所提到的，从 NetworkManager 1.2.4 (ubuntu 16.10) 开始，所有非 wifi/wwan 设备都被视为不受管理（请参阅他在类似问题Network Manager refiling to manage wireless interfaces 中的回答）。一个解决方案是创建一个空文件：

sudo touch /etc/NetworkManager/conf.d/10-globally-managed-devices.conf

...这将覆盖/覆盖 /usr/lib 中的那个，然后重新启动网络管理器。