Eu segui estas instruções e instalei o firmware b43-instalador. O WiFi começou a funcionar, mas de maneira muito incerta e às vezes muito lento. Eu tenho o Windows 7 como o segundo sistema operacional no mesmo laptop e WiFi funciona bem.
Também segui o conselho de perguntas semelhantes e reinstalei o bcmwl-kernel-source e verifiquei a lista negra.
Hoje, parou para funcionar completamente: vejo as redes sem fio, mas não consigo me conectar a elas (é só mostrar a roda de fiar todas as vezes).
Talvez o problema não esteja no próprio módulo WiFi, como agora também não consigo alterar nenhum driver proprietário: se eu selecionar outro driver da lista para a Nvidia nada muda, ou se selecionar 'não usar este dispositivo' para Broadcom também nada alterar. Os drivers selecionados anteriormente ainda estão marcados como selecionados.
Recebi a seguinte mensagem erro quando tentei alterar o driver ontem.
Meu sistema é o Xubuntu 16.04, instalado há uma semana.
Vale a pena tentar o NDISWrapper no meu caso?
oz@aspire:~$ lspci -vnn -d 14e4:
02:00.0 Ethernet controller [0200]: Broadcom Corporation NetLink BCM57785 Gigabit Ethernet PCIe [14e4:16b5] (rev 10)
Subsystem: Acer Incorporated [ALI] NetLink BCM57785 Gigabit Ethernet PCIe [1025:0504]
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at d1830000 (64-bit, prefetchable) [size=64K]
Memory at d1840000 (64-bit, prefetchable) [size=64K]
Expansion ROM at 9fb00000 [disabled] [size=2K]
Capabilities: <access denied>
Kernel driver in use: tg3
Kernel modules: tg3
02:00.1 SD Host controller [0805]: Broadcom Corporation BCM57765/57785 SDXC/MMC Card Reader [14e4:16bc] (rev 10) (prog-if 01)
Subsystem: Acer Incorporated [ALI] BCM57765/57785 SDXC/MMC Card Reader [1025:0504]
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at d1800000 (64-bit, prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: sdhci-pci
Kernel modules: sdhci_pci
02:00.2 System peripheral [0880]: Broadcom Corporation BCM57765/57785 MS Card Reader [14e4:16be] (rev 10)
Subsystem: Acer Incorporated [ALI] BCM57765/57785 MS Card Reader [1025:0504]
Flags: bus master, fast devsel, latency 0, IRQ 7
Memory at d1810000 (64-bit, prefetchable) [size=64K]
Capabilities: <access denied>
02:00.3 System peripheral [0880]: Broadcom Corporation BCM57765/57785 xD-Picture Card Reader [14e4:16bf] (rev 10)
Subsystem: Acer Incorporated [ALI] BCM57765/57785 xD-Picture Card Reader [1025:0504]
Flags: bus master, fast devsel, latency 0, IRQ 7
Memory at d1820000 (64-bit, prefetchable) [size=64K]
Capabilities: <access denied>
03:00.0 Network controller [0280]: Broadcom Corporation BCM43227 802.11b/g/n [14e4:4358]
Subsystem: Foxconn International, Inc. BCM43227 802.11b/g/n [105b:e040]
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at d1900000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: wl
Kernel modules: bcma, wl
oz@aspire:~$ apt-cache search broadcom-sta-dkms
broadcom-sta-dkms - dkms source for the Broadcom STA Wireless driver
broadcom-sta-source - Source for the Broadcom STA Wireless driver
oz@aspire:~$ iwconfig
lo no wireless extensions.
enp2s0f0 no wireless extensions.
wlp3s0 IEEE 802.11 ESSID:"Ufanet_43"
Mode:Managed Frequency:2.462 GHz Access Point: 22:4A:03:77:BD:F0
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
oz@aspire:~$ sudo lshw -class network
[sudo] password for oz:
*-network
description: Ethernet interface
product: NetLink BCM57785 Gigabit Ethernet PCIe
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: enp2s0f0
version: 10
serial: b8:70:f4:ed:5e:60
size: 100Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi msix pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.137 duplex=full firmware=sb ip=100.94.228.134 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:16 memory:d1830000-d183ffff memory:d1840000-d184ffff memory:9fb00000-9fb007ff
*-network
description: Wireless interface
product: BCM43227 802.11b/g/n
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 00
serial: cc:af:78:07:16:9e
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=wl0 driverversion=6.30.223.271 (r587334) latency=0 multicast=yes wireless=IEEE 802.11
resources: irq:17 memory:d1900000-d1903fff
oz@aspire:~$ rfkill list all
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
1: brcmwl-0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: acer-wireless: Wireless LAN
Soft blocked: no
Hard blocked: no
oz@aspire:~$ dmesg | grep -i firmware
[ 0.065652] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[ 4.357377] psmouse serio1: elantech: assuming hardware version 3 (with firmware version 0x450f01)
Recebi a resposta do usuário Hadaka e postarei aqui para alguém que tenha o mesmo problema.
sudo apt-get update
sudo apt-get remove --purge bcma
sudo apt-get install --reinstall bcmwl-kernel-source
sudo sed -i 's/3/2/' /etc/NetworkManager/conf.d/*
sudo sed -i '/ipv6/{n;s/.*/method=ignore/}' /etc/NetworkManager/*/Ufanet_43
systemctl restart network-manager.service
Tudo graças a Hadaka