标题说明了一切，我刚刚安装了 Lubuntu 12.10，但它无法连接到内联网和/或互联网。实际上，它是随机工作的，如果我重启电脑 2-3 次，它可能会工作 1 次。
但它现在启动了，但无法工作。这是我从 lspci、lsmod 和 ifconfig 得到的信息：
daniel@server:~$ lspci
00:00.0 Host bridge: Intel Corporation 82Q963/Q965 Memory Controller Hub (rev 02)
00:02.0 VGA compatible controller: Intel Corporation 82Q963/Q965 Integrated Graphics Controller (rev 02)
00:1a.0 USB controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 (rev 02)
00:1a.7 USB controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 (rev 02)
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 (rev 02)
00:1c.4 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 5 (rev 02)
00:1d.0 USB controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 (rev 02)
00:1d.1 USB controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 (rev 02)
00:1d.2 USB controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 (rev 02)
00:1d.7 USB controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev f2)
00:1f.0 ISA bridge: Intel Corporation 82801HB/HR (ICH8/R) LPC Interface Controller (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801H (ICH8 Family) 4 port SATA Controller [IDE mode] (rev 02)
00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller (rev 02)
00:1f.5 IDE interface: Intel Corporation 82801HR/HO/HH (ICH8R/DO/DH) 2 port SATA Controller [IDE mode] (rev 02)
03:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5755 Gigabit Ethernet PCI Express (rev 02)
0a:0c.0 Multimedia controller: Philips Semiconductors SAA7131/SAA7133/SAA7135 Video Broadcast Decoder (rev d1)
daniel@server:~$ lsmod
Module Size Used by
saa7134_alsa 18052 0
rc_msi_tvanywhere_plus 12490 0
ir_kbd_i2c 12983 0
rfcomm 37276 0
bnep 17707 2
parport_pc 31968 0
bluetooth 183228 10 rfcomm,bnep
ppdev 12817 0
tda827x 17778 1
coretemp 13168 0
kvm_intel 126745 0
kvm 357806 1 kvm_intel
snd_hda_codec_analog 75059 1
tda8290 22061 1
tuner 26797 1
snd_hda_intel 32515 1
snd_hda_codec 111547 2 snd_hda_codec_analog,snd_hda_intel
microcode 18209 0
snd_hwdep 13272 1 snd_hda_codec
snd_pcm 80163 3 saa7134_alsa,snd_hda_intel,snd_hda_codec
snd_seq_midi 13132 0
snd_rawmidi 25382 1 snd_seq_midi
snd_seq_midi_event 14475 1 snd_seq_midi
snd_seq 51255 2 snd_seq_midi,snd_seq_midi_event
psmouse 84843 0
saa7134 157506 1 saa7134_alsa
tpm_tis 18208 0
rc_core 21266 4 rc_msi_tvanywhere_plus,ir_kbd_i2c,saa7134
videobuf_dma_sg 18714 2 saa7134_alsa,saa7134
videobuf_core 25097 2 saa7134,videobuf_dma_sg
v4l2_common 15767 2 tuner,saa7134
videodev 95841 3 tuner,saa7134,v4l2_common
serio_raw 13031 0
tveeprom 17009 1 saa7134
snd_timer 24411 2 snd_pcm,snd_seq
snd_seq_device 14137 3 snd_seq_midi,snd_rawmidi,snd_seq
lpc_ich 16925 0
snd 61991 12 saa7134_alsa,snd_hda_codec_analog,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
i915 457161 2
mac_hid 13037 0
drm_kms_helper 45271 1 i915
drm 230463 3 i915,drm_kms_helper
i2c_algo_bit 13197 1 i915
video 18847 1 i915
soundcore 14599 1 snd
snd_page_alloc 14036 2 snd_hda_intel,snd_pcm
lp 13299 0
parport 40753 3 parport_pc,ppdev,lp
hid_generic 12445 0
usbhid 41702 0
hid 82142 2 hid_generic,usbhid
floppy 55444 0
tg3 130448 0
daniel@server:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:1a:6b:51:4a:b7
adr inet6: fe80::21a:6bff:fe51:4ab7/64 Scope:Lien
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Packets reçus:4 erreurs:0 :0 overruns:0 frame:0
TX packets:50 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:439 (439.0 B) Octets transmis:9972 (9.9 KB)
Interruption:16
lo Link encap:Boucle locale
inet adr:127.0.0.1 Masque:255.0.0.0
adr inet6: ::1/128 Scope:Hôte
UP LOOPBACK RUNNING MTU:16436 Metric:1
Packets reçus:4952 erreurs:0 :0 overruns:0 frame:0
TX packets:4952 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:0
Octets reçus:377832 (377.8 KB) Octets transmis:377832 (377.8 KB)
该计算机是一台旧款联想/IBM M52 Thinkcentre，配备英特尔 E6400 双核处理器、2GB RAM 和 GMA950 IGP 芯片。以太网出了什么问题？
请注意，Windows 7 和 Windows XP 也安装在同一个 40GB SSD 上，并且从 GRUB 正确启动，两者均可与我的以太网卡正常工作。在我的交换机上，无论我使用的是 XP、7 还是 Lubuntu OS，我都可以看到这台 IBM 计算机端口上的指示灯为绿色。
请注意，我并不是 Linux 专家或其他什么人，我认为自己是个菜鸟，我正在尽我所能去学习。
答案1
我已在 DHCP 服务器上为该计算机分配了一个固定的内部 IP 地址。如果我删除该分配，它就可以正常工作。因为我实际上不需要固定 IP 地址，所以我认为我的问题现在已经解决了。