ubuntu no se conecta a internet

[sumolari]

Pues esto me dice:

lluis@PCLLUIS:~$ lspci | grep Ether
03:02.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
03:05.0 Ethernet controller: Atheros Communications, Inc. AR5006X 802.11abg NIC (rev 01)
lluis@PCLLUIS:~$ lsmod
Module Size Used by
nls_utf8 3200 1
nls_cp437 6912 1
vfat 14720 1
fat 56348 1 vfat
ipv6 272288 8
binfmt_misc 13448 1
rfcomm 42260 0
l2cap 27136 5 rfcomm
bluetooth 53476 4 rfcomm,l2cap
speedstep_lib 5764 0
cpufreq_userspace 5408 0
cpufreq_stats 7744 0
freq_table 6048 1 cpufreq_stats
cpufreq_powersave 2944 0
cpufreq_ondemand 8876 0
cpufreq_conservative 8712 0
video 17540 0
tc1100_wmi 8324 0
sony_acpi 6412 0
sbs 16804 0
pcc_acpi 14080 0
i2c_ec 6272 1 sbs
hotkey 11556 0
dev_acpi 12292 0
container 5632 0
button 7952 0
battery 11652 0
asus_acpi 17688 0
ac 6788 0
sbp2 24584 0
lp 12964 0
saa7134_alsa 15392 0
af_packet 24584 2
wlan_scan_sta 15744 0
tsdev 9152 0
saa7134 118496 1 saa7134_alsa
ath_pci 100000 0
ath_rate_sample 16512 1 ath_pci
wlan 207580 4 wlan_scan_sta,ath_pci,ath_rate_sample
usb_storage 75072 1
video_buf 27652 2 saa7134_alsa,saa7134
compat_ioctl32 2432 1 saa7134
v4l2_common 17280 1 saa7134
v4l1_compat 15108 1 saa7134
ir_kbd_i2c 9872 1 saa7134
ir_common 28548 2 saa7134,ir_kbd_i2c
ath_hal 192976 3 ath_pci,ath_rate_sample
videodev 10752 1 saa7134
snd_hda_intel 20116 1
snd_hda_codec 164608 1 snd_hda_intel
libusual 17040 1 usb_storage
8139cp 24832 0
8139too 29056 0
mii 6912 2 8139cp,8139too
usbhid 45152 0
psmouse 41352 0
serio_raw 8452 0
sg 37404 0
i2c_core 23424 3 i2c_ec,saa7134,ir_kbd_i2c
snd_pcm_oss 47360 0
snd_mixer_oss 19584 1 snd_pcm_oss
snd_pcm 84612 4 saa7134_alsa,snd_hda_intel,snd_hda_codec,snd_pcm_o ss
snd_timer 25348 1 snd_pcm
snd 58372 9 saa7134_alsa,snd_hda_intel,snd_hda_codec,snd_pcm_o ss,snd_mixer_oss,snd_pcm,snd_timer
evdev 11392 2
parport_pc 37796 1
parport 39496 2 lp,parport_pc
intel_agp 26012 1
agpgart 34888 1 intel_agp
pcspkr 4352 0
shpchp 42144 0
pci_hotplug 32828 1 shpchp
hw_random 7320 0
soundcore 11232 1 snd
snd_page_alloc 11400 2 snd_hda_intel,snd_pcm
ext3 142728 1
jbd 62228 1 ext3
ohci1394 37040 0
ieee1394 306104 2 sbp2,ohci1394
ehci_hcd 34696 0
uhci_hcd 24968 0
usbcore 134912 6 usb_storage,libusual,usbhid,ehci_hcd,uhci_hcd
ide_generic 2432 0
sd_mod 22656 5
ata_piix 11780 2
libata 74892 1 ata_piix
scsi_mod 144648 5 sbp2,usb_storage,sg,sd_mod,libata
ide_cd 33696 0
cdrom 38944 1 ide_cd
piix 11780 1
generic 5764 0
thermal 15624 0
processor 31560 1 thermal
fan 6020 0
fbcon 41504 0
tileblit 3840 1 fbcon
font 9344 1 fbcon
bitblit 7168 1 fbcon
softcursor 3328 1 bitblit
vesafb 9244 0
capability 5896 0
commoncap 8704 1 capability
lluis@PCLLUIS:~$

Sí, uso DHCP