Se você começar a ter mais problemas com ele, tente esse comando no terminal.
sudo apt-get install firmware-b43-installer
Funcionou para mim em um laptop HP mais antigo.
Eu sou um novo usuário do Ubuntu (toda a minha experiência anterior no Windows). Eu comecei recentemente a dual boot por causa do trabalho, então eu instalei o Ubuntu 12.04 no meu Dell Inspiron 1525. Possui uma placa Broadcom BCM4312 Wireless. Eu não tenho problemas para conseguir uma conexão ethernet para funcionar, mas meu wireless está agindo de forma estranha, para dizer o mínimo. Eu posso ver todas as redes disponíveis (obviamente, incluindo a minha), mas sempre que eu tento me conectar a ela, repetidamente me pede para autenticar a conexão. Estou absolutamente certo de que estou inserindo a senha correta (configuração de segurança WPA), mas ela se recusa a se conectar. Eu tenho navegado e tentei outras respostas sem sucesso, mas eu sou completamente novo no Ubuntu e não tenho idéia do que alguns dos comandos do terminal estão realmente fazendo, por isso poderia ser erro do usuário. Alguém aí disposto a me ajudar? Obrigado.
Editar: respostas do terminal
lscpi -nn response:
00:00.0 Host bridge [0600]: Intel Corporation Mobile PM965/GM965/GL960 Memory
Controller Hub [8086:2a00] (rev 0c)
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile GM965/GL960
Integrated Graphics Controller (primary) [8086:2a02] (rev 0c)
00:02.1 Display controller [0380]: Intel Corporation Mobile GM965/GL960 Integrated
Graphics Controller (secondary) [8086:2a03] (rev 0c)
00:1a.0 USB controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI
Controller #4 [8086:2834] (rev 02)
00:1a.1 USB controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI
Controller #5 [8086:2835] (rev 02)
00:1a.7 USB controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB2 EHCI
Controller #2 [8086:283a] (rev 02)
00:1b.0 Audio device [0403]: Intel Corporation 82801H (ICH8 Family) HD Audio
Controller [8086:284b] (rev 02)
00:1c.0 PCI bridge [0604]: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1
[8086:283f] (rev 02)
00:1c.1 PCI bridge [0604]: Intel Corporation 82801H (ICH8 Family) PCI Express Port 2
[8086:2841] (rev 02)
00:1c.4 PCI bridge [0604]: Intel Corporation 82801H (ICH8 Family) PCI Express Port 5
[8086:2847] (rev 02)
00:1d.0 USB controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI
Controller #1 [8086:2830] (rev 02)
00:1d.1 USB controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI
Controller #2 [8086:2831] (rev 02)
00:1d.2 USB controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI
Controller #3 [8086:2832] (rev 02)
00:1d.7 USB controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB2 EHCI
Controller #1 [8086:2836] (rev 02)
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448]
(rev f2)
00:1f.0 ISA bridge [0601]: Intel Corporation 82801HM (ICH8M) LPC Interface
Controller [8086:2815] (rev 02)
00:1f.1 IDE interface [0101]: Intel Corporation 82801HM/HEM (ICH8M/ICH8M-E) IDE
Controller [8086:2850] (rev 02)
00:1f.2 SATA controller [0106]: Intel Corporation 82801HM/HEM (ICH8M/ICH8M-E) SATA
Controller [AHCI mode] [8086:2829] (rev 02)
00:1f.3 SMBus [0c05]: Intel Corporation 82801H (ICH8 Family) SMBus Controller
[8086:283e] (rev 02)
02:09.0 FireWire (IEEE 1394) [0c00]: Ricoh Co Ltd R5C832 IEEE 1394 Controller
[1180:0832] (rev 05)
02:09.1 SD Host controller [0805]: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host
Adapter [1180:0822] (rev 22)
02:09.2 System peripheral [0880]: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter
[1180:0592] (rev 12)
02:09.3 System peripheral [0880]: Ricoh Co Ltd xD-Picture Card Controller
[1180:0852] (rev 12)
09:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd. 88E8040 PCI-E Fast
Ethernet Controller [11ab:4354] (rev 12)
0b:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY
[14e4:4315] (rev 01)
lsmod response:
Module Size Used by
michael_mic 12541 8
arc4 12474 4
snd_hda_codec_idt 60238 1
snd_hda_codec_hdmi 31778 1
gpio_ich 13160 0
joydev 17394 0
hid_generic 12485 0
dell_wmi 12602 0
sparse_keymap 13659 1 dell_wmi
dell_laptop 17210 0
dcdbas 14099 1 dell_laptop
coretemp 13362 0
microcode 18396 0
parport_pc 32115 0
ppdev 12850 0
rfcomm 38104 12
bnep 17791 2
r852 17906 0
sm_common 16773 1 r852
snd_hda_intel 33029 3
snd_hda_codec 116477 3 snd_hda_codec_idt,snd_hda_codec_hdmi,snd_hda_intel
snd_hwdep 13277 1 snd_hda_codec
usbhid 46054 0
hid 82511 2 hid_generic,usbhid
uvcvideo 72249 0
videobuf2_core 32212 1 uvcvideo
videodev 100265 2 uvcvideo,videobuf2_core
videobuf2_vmalloc 12757 1 uvcvideo
videobuf2_memops 13213 1 videobuf2_vmalloc
r592 17809 0
memstick 15886 1 r592
snd_pcm 81124 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
psmouse 91022 0
serio_raw 13032 0
btusb 17952 0
bluetooth 189585 24 rfcomm,bnep,btusb
nand 49703 2 r852,sm_common
nand_ids 8548 1 nand
mtd 38671 2 sm_common,nand
nand_bch 13004 1 nand
bch 21768 1 nand_bch
nand_ecc 13106 1 nand
lpc_ich 16993 0
lib80211_crypt_tkip 17276 0
mac_hid 13078 0
wl 2906598 0
snd_seq_midi 13133 0
i915 470823 3
cfg80211 181041 1 wl
lib80211 14041 2 lib80211_crypt_tkip,wl
drm_kms_helper 47459 1 i915
snd_rawmidi 25426 1 snd_seq_midi
wmi 18745 1 dell_wmi
drm 240232 4 i915,drm_kms_helper
snd_seq_midi_event 14476 1 snd_seq_midi
i2c_algo_bit 13317 1 i915
video 19070 1 i915
snd_seq 51594 2 snd_seq_midi,snd_seq_midi_event
snd_timer 28932 2 snd_pcm,snd_seq
snd_seq_device 14138 3 snd_seq_midi,snd_rawmidi,snd_seq
snd 62675 16 snd_hda_codec_idt,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore 14636 1 snd
snd_page_alloc 14109 2 snd_hda_intel,snd_pcm
lp 17456 0
parport 40931 3 parport_pc,ppdev,lp
firewire_ohci 36110 0
firewire_core 61957 1 firewire_ohci
crc_itu_t 12628 1 firewire_core
sdhci_pci 18263 0
sdhci 32293 1 sdhci_pci
sky2 53629 0
Se você começar a ter mais problemas com ele, tente esse comando no terminal.
sudo apt-get install firmware-b43-installer
Funcionou para mim em um laptop HP mais antigo.