I have a HP 15-ac149tx notebook with ubuntu 14.04 intalled and i am facing problem with the wifi . At first it didnt work then i tried this
sudo add-apt-repository ppa:hanipouspilot/rtlwifi
sudo apt-get update
sudo apt-get install rtlwifi-new-dkms linux-firmware
It worked but i am getting very weak connection like i have to sit next to the router to get the connection that to one bar out of three.
How can i increase the connection ? Do i need any usb wireless adapter for this issue ? If so please let me know which one to buy that works on ubuntu 14.04 .