“有线网络断开连接”即使在连接时也无法连接以太网

Question

我无法通过以太网或 WiFi 连接到互联网。让我们解决以太网问题，嗯？我刚刚在 HP Mini 1000 上安装了 Ubuntu 12.04。以前它有 11.04，然后以太网没有任何问题。我是 Linux 初学者，过去几天一直在研究这个问题，但没有任何进展。

以下是一些输出：

$ sudo lshw -C network
*-network               
   description: Network controller
   product: BCM4312 802.11b/g LP-PHY
   vendor: Broadcom Corporation
   physical id: 0
   bus info: pci@0000:01:00.0
   version: 01
   width: 64 bits
   clock: 33MHz
   capabilities: pm msi pciexpress bus_master cap_list
   configuration: driver=b43-pci-bridge latency=0
   resources: irq:16 memory:feafc000-feafffff
*-network
   description: Ethernet interface
   product: 88E8040 PCI-E Fast Ethernet Controller
   vendor: Marvell Technology Group Ltd.
   physical id: 0
   bus info: pci@0000:02:00.0
   logical name: eth0
   version: 00
   serial: 00:25:b3:48:e7:60
   capacity: 100Mbit/s
   width: 64 bits
   clock: 33MHz
   capabilities: pm msi pciexpress cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
   configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 latency=0 link=no multicast=yes port=twisted pair
   resources: irq:42 memory:febfc000-febfffff ioport:ec00(size=256)

lspci

00:00.0 Host bridge: Intel Corporation Mobile 945GSE Express Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GSE Express Integrated     Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 2 (rev 02)
00:1d.0 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 (rev 02)
00:1d.1 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 02)
00:1d.2 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 02)
00:1d.3 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 02)
00:1d.7 USB controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 02)
00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 02)
01:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01)
02:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8040 PCI-E Fast Ethernet Controller

谢谢你的帮助！

Answer 1

找到了解决办法：

在 中/etc/NetworkManager/NetworkManager.conf，我将managed=false更改为managed=true。

然后运行：

sudo service network-manager restart

瞧。

Answer 2

有时NetworkManager可能有点像天后，开始搞乱你不想要的事情。尝试获取您想要连接的ifconfig wlan0无线设备或ifconfig eth0以太网设备的物理设备的 MAC 地址。复制 HWaddr 之后的所有内容。然后编辑/etc/NetworkManager/NetworkManager.conf您将需要使用超级用户权限对其进行编辑。添加

[keyfile]
unmanaged-devices=mac:<copied HWaddr>;

然后你可以手动连接，这里讨论如何使用命令行连接到 WPA wifi 网络？

祝你好运！