dell inspiron WiFi adapter not detected in Ubuntu 24.04

 sudo apt-get remove bcmwl-kernel-source

sudo apt-get install firmware-b43-installer b43-fwcutter

cat /etc/modprobe.d/* | egrep 'bcm'
(You may want to copy this) and see if the term 'blacklist bcm43xx' is there.

If it is, type cd /etc/modprobe.d/ and then sudo gedit blacklist.conf

Put a # in front of the line: blacklist bcm43xx