Till last year whenever I encountered a laptop with WiFi not working in linux it was a Broadcom Wireless Adapter.
But this year things are different. Nearly all new HP laptops are having problems with WiFi in linux (ubuntu, arch, manjaro). And surprisingly the problem is not that the WiFi driver is not working at all. But it is worse, the signal strength received is so weak that it is absolutely unusable.
lspci | grep Wireless shows the Wireless Adapter in your system. In my case the device causing problem was a Realtek:
After scanning through numerous threads I finally found the solution in this github issue:
So here is the step by step procedure to solve the issue:
First some make sure the dependencies for building the driver are installed:
Now clone the rtlwifi_new repository:
Checkout the branch rock.new_btcoex
Now build and install the driver
Reboot the system.
Now disable and enable the driver with proper parameters.
NOTE: If this does not work try:
sudo modprobe -v rtl8723be ant_sel=1
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