Eu tive o mesmo problema no meu laptop. Eu executei esses comandos e depois que funcionou:
sudo apt-get install linux-headers-generic
sudo apt-get install --reinstall bcmwl-kernel-source
sudo modprobe wl
Esta manhã eu instalei algumas das atualizações para o Ubuntu 12.10 e meu WiFi desapareceu.
Esta é a saída para rfkill list all :
0: hci0: Bluetooth
Soft blocked: yes
Hard blocked: no
Você pode ver que não há nem mesmo uma opção para sem fio. Eu também tentei:
sudo lshw -c network
*-network NO RECLAMADO
descripción: Network controller
producto: Realtek Semiconductor Co., Ltd.
fabricante: Realtek Semiconductor Co., Ltd.
id físico: 0
información del bus: pci@0000:02:00.0
versión: 00
anchura: 64 bits
reloj: 33MHz
capacidades: pm msi pciexpress bus_master cap_list
configuración: latency=0
recursos: ioport:e000(size=256) memoria:f7d00000-f7d03fff
*-network
descripción: Ethernet interface
producto: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
fabricante: Realtek Semiconductor Co., Ltd.
id físico: 0.2
información del bus: pci@0000:03:00.2
nombre lógico: eth0
versión: 06
serie: 00:90:f5:e2:f7:05
tamaño: 100Mbit/s
capacidad: 100Mbit/s
anchura: 64 bits
reloj: 33MHz
capacidades: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuración: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8402-1_0.0.1 10/26/11 ip=192.168.1.38 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
recursos: irq:41 ioport:d000(size=256) memoria:f0004000-f0004fff memoria:f0000000-f0003fff
O laptop é um Airis Praxis N1204 32 bits.
Qualquer ajuda seria muito apprecaited como eu tenho tentado consertá-lo desde 9 am Obrigado pelas respostas até agora. Eu tentei as duas soluções sugeridas abaixo, mas infelizmente o problema persiste.
Esta é a saída de lspci :
00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4)
00:1c.2 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 (rev c4)
00:1c.3 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 4 (rev c4)
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation 7 Series Chipset Family LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04)
02:00.0 Network controller: Realtek Semiconductor Co., Ltd. Device 8723
03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device 5286 (rev 01)
03:00.2 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 06)
Eu tive o mesmo problema no meu laptop. Eu executei esses comandos e depois que funcionou:
sudo apt-get install linux-headers-generic
sudo apt-get install --reinstall bcmwl-kernel-source
sudo modprobe wl
Experimente os seguintes comandos:
sudo apt-get remove --purge bcmwl-kernel-source
sudo apt-get install linux-firmware-nonfree