I recently purchased an HP M127fw printer/scanner, largely because of its rumored excellent support for Linux. Indeed, installing and getting it working was super easy – but only once I stumbled onto the right method. (First I read page after page about the HPLIP printing system and possible necessary plugins, and saw many different sets of (relatively) complicated instructions for installation, each one a beautiful and unique snowflake.)
But here’s all you have to do: run hp-setup, preferably as root:
sudo hp-setupaaaaand that’s pretty much it. If you have Linux Mint 17 (and I’m sure many other distros, but this is what I can verify), then you already have hp-setup installed on your system. If not, you’ll have to use your package manager to get it. I’ve included screenshots below so you can see what to expect.
Above was the only moment of confusion. I can’t tell you the difference between the middle two options, but the selected option gave me what I wanted: the printer is now a device on my wireless network.
This annoyance is because I didn’t run it with sudo. 
Learn from my mistakes!
Above is how this window appeared initially. The only changes I made were to the printer name and test page checkbox:
Below you can see some of the options the driver provides. Scanning works, as well (although my Mac got much better results from the ADF).
