Eu pesquisei e procurei na internet, mas continuo chegando a pontos de parada. Eu tenho um Network controller [0280]: Broadcom Limited BCM4352 802.11ac Wireless Network Adapter [14e4:43b1] (rev 03) no meu computador que escorei com o comando lspci -nn .
Analisei as perguntas em torno deste fórum, mas não consegui encontrar uma resposta específica e outras não funcionaram. Por exemplo. Eu uso a série de comandos
sudo apt-get update
sudo apt-get install bcmwl-kernel-source
sudo modprobe wl
após a atualização, recebi este
W: The repository 'cdrom://Ubuntu 16.04.1 LTS _Xenial Xerus_ - Release amd64 (20160719) xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'http://old-releases.ubuntu.com/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'http://old-releases.ubuntu.com/ubuntu xenial-updates Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'http://old-releases.ubuntu.com/ubuntu xenial-backports Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'http://old-releases.ubuntu.com/ubuntu xenial-security Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch cdrom://Ubuntu 16.04.1 LTS _Xenial Xerus_ - Release amd64 (20160719)/dists/xenial/main/binary-amd64/Packages Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
E: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/xenial/multiverse/source/Sources 404 Not Found
E: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/xenial-updates/multiverse/source/Sources 404 Not Found
E: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/xenial-backports/main/source/Sources 404 Not Found
E: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/xenial-security/multiverse/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
depois, usando o próximo passo que recebi
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package bcmwl-kernel-source is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'bcmwl-kernel-source' has no installation candidate
então, apenas para testar o último passo
modprobe: FATAL: Module wl not found in directory /lib/modules/4.4.0-57-generic
Eu usei isso antes para tentar corrigir os erros 404, mas isso não ajudou com o meu problema sem fio. Como instalar software ou atualizar de um antigo sem suporte lançamento?
Acabei alterando a configuração do driver adicional para "Não usar este dispositivo" e reiniciei o computador, e o driver desapareceu completamente.
Além disso, eu tentei usar um dongle, ele tem uma tentativa de entender o sinal wifi e às vezes é muito lento para fazer qualquer trabalho.
A pergunta é: como faço para recuperar o driver e como faço para que ele funcione? Obrigado pela leitura.