$ sudo apt-get install rtlwifi-new-dkms linux-firmware Step 1: Ubuntu : $ sudo add-apt-repository ppa:hanipouspilot/rtlwifi Note: its suggested to have latest kernel installed(Linux kernel 4+). Installing new driver for the Realtek wifi chip.Save and restart( f10), open up a terminal ( ctrl + alt + t) and type the following commands in order. This is very important as third party drivers won’t work in secure boot mode as they are not verified. Then go into System Configuration->Boot options and Disable secure boot. Get into your BIOS( in my case I had to press f10 after turning on my laptop).Follow these steps to get your wifi working in Ubuntu. At last, I found a fix from ubuntu forums. I tried many drivers and none of them fixed the disconnection and low wifi range problems. For a long time, there was no perfect driver for this device. It’s having a Realtek rtl8723be Wifi Card. I have been searching for a fix for the wifi problems in my HP Pavillion ab-028tx.
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