WiFi가 갑자기 작동하지 않음

케이블을 사용해서 인터넷에 접속할 수 있어요. Ubuntu 14.04.4 LTS를 사용하는 HP Pavilion dv6 노트북이 있습니다.

$ 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

여기 그는 매우 비슷한 문제를 겪고 있는 것 같았고 다음 명령으로 문제를 해결했습니다.

$ sudo apt-get purge bcmwl-kernel-source broadcom-sta-common broadcom-sta-source && \
  sudo apt-get install b43-fwcutter firmware-b43-installer

그런데 Broadcom이 없는데... 비슷한 명령을 실행할 수 있나요?