I recently acquired a Cintiq 16, and it the pen works great on the tablet as long as I'm using the pen with any program that isn't Inkscape, or as long as I'm using either duplicate or second display only. If I'm using Extend Display however, the pen and clicking using the mouse or the trackpad will register about an inch and a half on the display above where I'm trying to draw. I've attached images to clarify what I'm saying.

I'm using a Windows 10 OS, and was hoping anyone else has run into this, and if they might have a fix so I can use the extended display function while drawing. 

Thanks!

I'm having a similar problem with my Huion Kamvas Pro 13 accept it is registering about a couple inches down and to the left of where I'm trying to draw.

I'm having the same issue with the UGEE M708 I purchased last week. GIMP, Corel, and even Microsoft Paint work just fine, but Inkscapes registers about an inch to the left with every stroke. And I've noticed it isn't just drawing, any functions I try to do (Even navigating options and settings outside the drawing area) seem to not be lining up with my tablet. 

I posted similar just recently upgraded my computer to have a new second monitor, along side my Ugee, and now I can't use my mouse or pen on the Ugee. Before this, I had a two monitor setup, and it was fine.  Can't open a file, or even get a drop down menu. I can open Inkscape on my new monitor, and its fine, but thats now where I want my work to be when I draw.