Acabei de comprar um novo notebook, um ThinkPad Edge E530, e instalei o Ubuntu nele. Eu sou muito novo no Ubuntu. No mesmo laptop, executando o Windows 7, a conexão Wi-Fi funciona bem. A conexão Ethernet funciona tanto no Win7 quanto no Ubuntu. Apenas o Wi-Fi no Ubuntu não funciona; ele se conecta ao ponto de acesso Wi-Fi, mas eu não tenho acesso à Internet.
Minha placa wireless é a Intel Centrino Wireless-N 2230. O que pode resolver o problema?
EDITAR:
ifconfig -a
eth0 Link encap:Ethernet HWaddr b8:88:e3:30:72:34
UP 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)
Interrupt:43 Base address:0x8000
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:163 errors:0 dropped:0 overruns:0 frame:0
TX packets:163 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:10124 (10.1 KB) TX bytes:10124 (10.1 KB)
usb0 Link encap:Ethernet HWaddr 02:15:e0:ec:01:00
UP BROADCAST RUNNING 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)
wlan0 Link encap:Ethernet HWaddr 68:5d:43:43:71:e1
inet addr:192.168.2.101 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::6a5d:43ff:fe43:71e1/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:40 errors:0 dropped:0 overruns:0 frame:0
TX packets:220 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2801 (2.8 KB) TX bytes:26230 (26.2 KB)
route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 wlan0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlan0
192.168.2.0 0.0.0.0 255.255.255.0 U 2 0 0 wlan0
cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.0.1
iwconfig
lo no wireless extensions.
usb0 no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:"SATELITE"
Mode:Managed Frequency:2.462 GHz Access Point: 00:1F:1F:8D:CC:08
Bit Rate=1 Mb/s Tx-Power=16 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=60/70 Signal level=-50 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:93 Invalid misc:243 Missed beacon:0
eth0 no wireless extensions.