I have a Lenovo G510 laptop with multi boot (Windows 10, Ubuntu 18.04, PrimeOS).
My problem is direct WiFi connectivity Ubuntu 18.04 - HP DeskJet 3630 All-In-One printer.
I used various recommended PPD files (HPLIP ver. 3.17.10 , 3.19.1 and so one), but not one is the right one .When I won't to add a new printer, principal errors are "No Printer found" or "No Scanner found".
Sometimes I can see a printer and it's work, but I never see a scanner or a copy.
In addition, it seems that Direct WiFi is bothering the main WiFi connection between the computer and the router,and at the moment, I'm losing the Internet.
If anyone has any idea of solving this problem ...

Direct WiFi is basically configuring the printer as an access point and really only useful if you do not have an existing WiFi network. You should connect the printer to your router's WiFi. I am not familiar with your particular model and you may have to connect the printer via USB to configure it for wifi while running hp-setup.

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