I run Ubuntu 18.04 on a Hewlett-Packard Pavilion dv6-3050us Entertainment Notebook. For nearly 2 years this has worked fine but suddenly I can get no internet. My hardware switch, which used to toggle between internet on or off, now toggles between airplane mode and nothing.
If I click on activities and Wi-Fi I get a message
no Wi-Fi adapter found.
lo no wireless extensions.
lspci -nnk does not include a network controller in its output list.
sudo lshw -C network returns blank.
I would be grateful for advice, and for any comments on what may have caused this.
Update 15 May - thank you for your contributions, K7AAY and Czar
ubuntu-drivers devices returns nothing.
I have followed (1) of the link you posted, Czar, but disconnecring the battery and holding the power button down has no effect.
(4) of that link - the HP website tells me that it does not provide drivers for my machine for any OS apart from Windows.
(6) of that link - I do not know how to reseat a wireless card.
You asked whether I had installed Ubuntu 20.04. I haven't, but might that solve the problem?
I'm not sure what you mean by changing the kernel from my grub menu. If I restart in recovery mode, or using Linux 4.15.0-96-generic, the problem persists.
I could buy a USB wifi adapter, but are there other things I could try first please?