I used this feature on Wnidows 7 and it worked perfect, recently I change my OS to Linux Mint 18.3 Sylvia Mate and I just realized that this feature only works for the zoom in, zoom out, when I try to do a pan it drags the whole window and also the same when I try to rotate my point of view.
I'm using blender with my Huion H610 as I used to do on Windows 7.
Thanks a lot man! my Linux is in spanish but it worked, in the "centro de control" then "visualizacion y comportamiento" "ventanas" in the pop up menu search for the "comportamiento" tab and I uncheck alt and chose Super (logo de windows) as You tell me, Thanks!!