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以太网未检测到

tag-icon • tag-icon networking drivers network-manager ethernet
以太网未检测到

ubuntu14.04 中检测不到以太网。只有在运行“sudo ethtool -s eth0 autoneg off speed 100”后才能检测到，之后它就可以正常工作了。每次启动后都必须执行此操作。如何解决这个问题？ethtool eth0 的输出为：

Settings for eth0:
Supported ports: 
Supported link modes:   10baseT/Half 10baseT/Full 
                        100baseT/Half 100baseT/Full 
                        1000baseT/Half 1000baseT/Full 
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes:  Not reported
Advertised pause frame use: No
Advertised auto-negotiation: No
Speed: 100Mb/s
Duplex: Half
Port: 
PHYAD: 0
Transceiver: ]
Auto-negotiation: off
Cannot get wake-on-lan settings: Operation not permitted
Current message level: 
Link detected: yes

sudo lshw -C network 的输出是：

*-network               
   description: Ethernet interface
   product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
   vendor: Realtek Semiconductor Co., Ltd.
   physical id: 0
   bus info: 
   logical name: eth0
   version: 10
   serial: 
   size: 100Mbit/s
   capacity: 1Gbit/s
   width: 64 bits
   clock: 33MHz
   capabilities: 
   configuration: autonegotiation=off broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8168g-3_0.0.1 04/23/13  latency=0 link=yes multicast=yes port= speed=100Mbit/s

答案1

我建议您在 /etc/rc.local 中添加所需的行：

gksudo gedit /etc/rc.local

如果您没有文本编辑器 gedit，请使用 nano 或 kate 或 leafpad。在 exit 0 上方添加一行：

ethtool -s eth0 autoneg off speed 100

仔细校对，保存并关闭文本编辑器。一切就绪。

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