This is a companion discussion topic for the original entry at http://mypaint.org/blog/2016/06/16/bounty-for-surface-pro-bugs/
We should also see if this problem is happening on Linux with those surface devices as well. That way if there are any N-Trig problems on Linux as well, we could try to get those fixed as well.
I’ve been hoping for ages that this would get solved, so I contributed. I was using MyPaint before I switched to a Surface Pro 3 and it was already my favorite drawing program then, but I was convinced that MyPaint and Surface Pro together would make for the ultimate drawing experience. Imagine my disappointment when it was unusable! Anyway, godspeed to anybody who takes on this task.
Im not sure if this has already been reported else where, or even helps, but I have a Surface Pro 3, and also have used a few distros of linux on it. So far I have tried 3 flavors of Ubuntu, Fedora, and Linux Mint ( Gnome, KDE, Cinnamon, and Xfce environments) and in all of those distros the latest release of Mypaint works 100% perfectly for me. The only function I could not use was the eraser button and right click; however that was because of Linux not having full compatibility with the surface pro…not an issue with Mypaint.
(Edit: Forgot to add, Ive noticed that when I run Mypaint in Win10, as soon as the application starts, I will have pressure sensitivity until I either lift the pen from the screen or press one of the buttons to pan the canvas. Again, not sure if that helps.)