I have a very poor signal with unstable connection on my BCM43142 wireless adapter. when I installed ubuntu for first time I had bcmwl-kernel-source driver by default installed and I chose it in software&update window which gives poor signal and low speed.
I also was able to install wireless-bcm43421-oneiric-dkms by a .deb file but not uninstall the previous one and that is still in the list of additional drivers, I did unselect that and chose wireless-bcm43421-oneiric-dkms after reboot there is no WiFi option to enable.
now I decided to install broadcom-sta-6.30. in the requirements README file of the package it says; On Ubuntu, you will need headers and tools. Try these commands:
# sudo apt-get install build-essential linux-headers-generic
# sudo apt-get build-dep linux
but on build-dep Is receive :
Reading package lists... Done
E: Unable to find a source package for linux
also after that the Build instruction is complicated to me as I am new to Linux and Ubuntu what should I do with the Error first, has anyone had the same problem as me with the WiFi adapter ? what is the best driver for BCM43142 [14e4:4365]
You need to have the source code repos activated in your sources.list. You can do that in the software and updates app, or manually edit it by doing
sudo vim /etc/apt/sources.listand uncommenting the lines by removing the # signs. They start with deb-src.Also, you should run this command to get the headers to avoid pulling in unneeded stuff:
sudo apt-get build-dep --no-install-recommends linux