De alguma forma, tudo foi bloqueado suavemente. A solução:
$ rfkill unblock all
Eu tenho acesso à internet usando um cabo. Eu tenho um notebook HP Pavilion dv6 e estou no Ubuntu 14.04.4 LTS.
$ ifconfig
eth0 Link encap:Ethernet HWaddr 08:2e:5f:73:8c:9b
inet adr:192.168.2.29 Bcast:192.168.2.255 Masque:255.255.255.0
adr inet6: fe80::a2e:5fff:fe73:8c9b/64 Scope:Lien
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Packets reçus:15403 erreurs:0 :0 overruns:0 frame:0
TX packets:12284 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:15442691 (15.4 MB) Octets transmis:1330124 (1.3 MB)
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:65536 Metric:1
Packets reçus:1402 erreurs:0 :0 overruns:0 frame:0
TX packets:1402 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:0
Octets reçus:212762 (212.7 KB) Octets transmis:212762 (212.7 KB)
$ lspci -v | grep -i network -A 6
04:00.0 Network controller: Intel Corporation Centrino Wireless-N 2230 (rev c4)
Subsystem: Intel Corporation Centrino Wireless-N 2230 BGN
Flags: bus master, fast devsel, latency 0, IRQ 45
Memory at c2500000 (64-bit, non-prefetchable) [size=8K]
Capabilities: <access denied>
Kernel driver in use: iwlwifi
Aqui ele parece ter um problema muito parecido e esse comando corrigiu:
$ sudo apt-get purge bcmwl-kernel-source broadcom-sta-common broadcom-sta-source && \
sudo apt-get install b43-fwcutter firmware-b43-installer
Mas eu não tenho um Broadcom ... Existe algum comando semelhante que eu possa executar?