因此，在网络停止工作之前，Ubuntu 中的一切都运行良好。我花了两天多的时间寻找解决方案，但毫无收获。以下是我的信息...非常感谢您的帮助。
grep -i eth /var/log/syslog | tail
Sep 25 16:31:59 jj-laptop NetworkManager[970]: <info> (eth0): cleaning up...
Sep 25 16:31:59 jj-laptop NetworkManager[970]: <info> (eth0): taking down device.
Sep 25 16:31:59 jj-laptop kernel: [23403.998837] sky2 0000:02:00.0: eth0: disabling interface
Sep 25 16:35:54 jj-laptop NetworkManager[970]: <info> (eth0): now managed
Sep 25 16:35:54 jj-laptop NetworkManager[970]: <info> (eth0): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Sep 25 16:35:54 jj-laptop NetworkManager[970]: <info> (eth0): bringing up device.
Sep 25 16:35:54 jj-laptop kernel: [23413.629424] sky2 0000:02:00.0: eth0: enabling interface
Sep 25 16:35:54 jj-laptop kernel: [23413.635703] ADDRCONF(NETDEV_UP): eth0: link is not ready
Sep 25 16:35:54 jj-laptop NetworkManager[970]: <info> (eth0): preparing device.
Sep 25 16:35:54 jj-laptop NetworkManager[970]: <info> (eth0): deactivating device (reason 'managed') [2]
进而
ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:17:42:14:e9:e1
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:4605 errors:0 dropped:0 overruns:0 frame:0
TX packets:287 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:315161 (315.1 KB) TX bytes:63680 (63.6 KB)
Interrupt:16
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:13018 errors:0 dropped:0 overruns:0 frame:0
TX packets:13018 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:880484 (880.4 KB) TX bytes:880484 (880.4 KB)
wlan0 Link encap:Ethernet HWaddr 00:13:02:d0:ee:13
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
还
iwconfig
lo no wireless extensions.
wlan0 IEEE 802.11abg ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=off
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:on
eth0 no wireless extensions.
而且当然
sudo lshw -C network
*-network
description: Ethernet interface
product: 88E8055 PCI-E Gigabit Ethernet Controller
vendor: Marvell Technology Group Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: eth0
version: 12
serial: 00:17:42:14:e9:e1
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 duplex=full firmware=N/A latency=0 link=no multicast=yes port=twisted pair speed=1Gbit/s
resources: irq:44 memory:f0000000-f0003fff ioport:2000(size=256) memory:c0a00000-c0a1ffff
*-network DISABLED
description: Wireless interface
product: PRO/Wireless 3945ABG [Golan] Network Connection
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:05:00.0
logical name: wlan0
version: 02
serial: 00:13:02:d0:ee:13
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwl3945 driverversion=3.2.0-31-generic firmware=15.32.2.9 latency=0 link=no multicast=yes wireless=IEEE 802.11abg
resources: irq:45 memory:c0100000-c0100fff
最后但并非最不重要的
lsmod
Module Size Used by
nls_iso8859_1 12617 0
nls_cp437 12751 0
vfat 17308 0
fat 55605 1 vfat
usb_storage 39646 0
uas 17828 0
dm_crypt 22528 0
rfcomm 38139 0
parport_pc 32114 0
bnep 17830 2
ppdev 12849 0
bluetooth 158438 10 rfcomm,bnep
binfmt_misc 17292 1
snd_hda_codec_idt 60251 1
pcmcia 39791 0
joydev 17393 0
snd_hda_intel 32765 3
snd_hda_codec 109562 2 snd_hda_codec_idt,snd_hda_intel
snd_hwdep 13276 1 snd_hda_codec
snd_pcm 80845 2 snd_hda_intel,snd_hda_codec
snd_seq_midi 13132 0
yenta_socket 27428 0
snd_rawmidi 25424 1 snd_seq_midi
snd_seq_midi_event 14475 1 snd_seq_midi
snd_seq 51567 2 snd_seq_midi,snd_seq_midi_event
pcmcia_rsrc 18367 1 yenta_socket
wacom_w8001 12906 0
irda 185517 0
arc4 12473 2
iwl3945 73111 0
iwl_legacy 71134 1 iwl3945
mac80211 436455 2 iwl3945,iwl_legacy
cfg80211 178679 3 iwl3945,iwl_legacy,mac80211
snd_timer 28931 2 snd_pcm,snd_seq
snd_seq_device 14172 3 snd_seq_midi,snd_rawmidi,snd_seq
dm_multipath 22710 0
pcmcia_core 21511 3 pcmcia,yenta_socket,pcmcia_rsrc
psmouse 96619 0
apanel 12718 0
serport 12808 1
serio_raw 13027 0
crc_ccitt 12595 1 irda
mac_hid 13077 0
snd 62064 15 snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_t imer,snd_seq_device
input_polldev 13648 1 apanel
soundcore 14635 1 snd
snd_page_alloc 14115 2 snd_hda_intel,snd_pcm
lp 17455 0
fujitsu_laptop 18504 0
parport 40930 3 parport_pc,ppdev,lp
dm_raid45 76451 0
xor 25987 1 dm_raid45
dm_mirror 21822 0
dm_region_hash 16065 1 dm_mirror
dm_log 18193 3 dm_raid45,dm_mirror,dm_region_hash
sdhci_pci 18324 0
sdhci 28241 1 sdhci_pci
sky2 49545 0
i915 414939 3
drm_kms_helper 45466 1 i915
drm 197692 4 i915,drm_kms_helper
i2c_algo_bit 13199 1 i915
video 19068 1 i915
答案1
您可能需要使用以下命令启动网络管理器
service network-manager start
或者，您可能会发现需要编辑 /etc/network/interfaces 并添加类似以下内容的行：
auto wlan0
iface wlan0 inet dhcp
dns-nameservers 192.168.0.1