（在進行任何更新之前，在上網本上使用 Ubuntu 10.04 LTS）無線工作正常，有線連接已使用 Windows 電腦進行了測試。
從電源管理器中選擇 auto eth0 失敗。
使用 Wicd 網路管理員 - 按連接到有線網路 - “連接”有線網路：正在取得 IP 位址... - 連線失敗：無法取得 IP 位址
alex@alex-laptop:~$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:24:54:df:22:d5
inet6 addr: fe80::224:54ff:fedf:22d5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:8558 errors:0 dropped:0 overruns:0 frame:0
TX packets:48 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:526280 (526.2 KB) TX bytes:9564 (9.5 KB)
Interrupt:18
在 eth0 上測試 dhclient
alex@alex-laptop:~$ sudo dhclient eth0
[sudo] password for alex:
Internet Systems Consortium DHCP Client V3.1.3
Copyright 2004-2009 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/eth0/00:24:54:df:22:d5
Sending on LPF/eth0/00:24:54:df:22:d5
Sending on Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 5
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 13
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 18
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 11
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
運行 dmesg
alex@alex-laptop:~$ dmesg | grep eth0
[ 1.092888] sky2 eth0: addr 00:24:54:df:22:d5
[ 13.521498] sky2 eth0: enabling interface
[ 13.522027] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 15.036628] sky2 eth0: Link is up at 100 Mbps, full duplex, flow control rx
[ 15.099270] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 21.505203] sky2 eth0: disabling interface
[ 21.516896] sky2 eth0: enabling interface
[ 21.517394] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 21.544054] sky2 eth0: disabling interface
[ 21.573775] sky2 eth0: enabling interface
[ 21.574326] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 23.085959] sky2 eth0: Link is up at 100 Mbps, full duplex, flow control rx
[ 23.086287] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 33.488031] eth0: no IPv6 routers present
[ 98.269052] sky2 eth0: disabling interface
[ 98.289665] sky2 eth0: enabling interface
[ 98.290176] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 99.795289] sky2 eth0: Link is up at 100 Mbps, full duplex, flow control rx
[ 99.795826] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 110.272732] eth0: no IPv6 routers present
[ 133.463522] sky2 eth0: Link is down.
[ 7748.854103] sky2 eth0: Link is up at 100 Mbps, full duplex, flow control rx
運行 ifup
alex@alex-laptop:~$ sudo ifup eth0
[sudo] password for alex:
Ignoring unknown interface eth0=eth0.
運行lspci
alex@alex-laptop:~$ lspci | grep -i ethernet
09:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8040 PCI-E Fast Ethernet Controller
alex@alex-laptop:~$ lshw -c Network | driver
WARNING: you should run this program as super-user.
No command 'driver' found, did you mean:
Command 'drivel' from package 'drivel' (universe)
driver: command not found
alex@alex-laptop:~$ lshw -c Network | grep driver
WARNING: you should run this program as super-user.
configuration: broadcast=yes driver=wl0 driverversion=5.60.48.36 latency=0 multicast=yes wireless=IEEE 802.11
configuration: broadcast=yes driver=sky2 driverversion=1.25 firmware=N/A latency=0 multicast=yes
跑步路線
alex@alex-laptop:/etc$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
link-local * 255.255.0.0 U 0 0 0 pan0
link-local * 255.255.0.0 U 0 0 0 eth1
我看到建議/etc/dhcp3/dhclient.conf透過在 rfc3442 前面放置 # 來編輯檔案並儲存並重新啟動，但這不起作用。
然後我嘗試添加到/etc/network/interfaces 自動 eth0 iface eth0 inet dhcp。最初的介面檔案是：
auto lo
iface lo inet loopback
我編輯為：
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
然後從啟動中刪除網路管理器，重新啟動後這也沒有幫助。任何想法為什麼有線連接仍然無法工作？
答案1
您的第一個區塊顯示您的本機網路上沒有 DHCP 伺服器。當你說網路介面在Windows下測試時是在這個網路上嗎？如果是，只需複製設定即可。如果不是，請致電您的 ISP 以取得連線資訊。可能需要一些 PPPoE 魔法，甚至需要提供您的 MAC 位址，以便他們能夠使其獲得 DHCP 設定。