How to solve the problem when Wifi device is not showing in ubuntu OS and keeps on disconnecting frequently?
Solution: Follow below steps:-
Step.1 Run below command to update the OS resource list
sudo apt-get update
Step.2 Run below command to install default broadcom wifi drivers
sudo apt-get install bcmwl-kernel-source
Step.3 Create a script file in /etc
sudo nano /etc/pm/sleep.d/99_wififix #! /bin/sh case “$1” in resume|thaw) service network-manager stop rm /var/lib/NetworkManager/NetworkManager.state service network-manager start ;; esac
Step.4 Now change permission of the above script
sudo chmod 755 /etc/pm/sleep.d/99_wififix
Step.5 Now finally reboot the system
sudo shutdown -r now
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