I have a Huion Q11K graphics tablet. Only the stylus pressure doesn't seem to work. I can use the pen to click on menu buttons and manipulate the view just fine. In fact holding shift while sculpting works with the stylus for smoothing. Only pen pressure in the 3D View doesn't work.
Also with ScreenCast enabled the pen registers a left click but has no effect.
I've spent a few hours looking for solutions but it seems that no one else has ever had this problem... So I'm hoping it's something stupid that I'm missing.