In Blender2.79b/Windows10-64bit,stroke's painted with mouse,using the texDraw brush(Strength = 1,Blend = Mix ) on the default DiffuseColor layer(No Alpha) work fine .
However on switching to a pressure sensitive tablet(on latest drivers),the stroke is suddenly next to invisible.On changing the Pressure Curve for the brush from the Original [origin (0,0,)end(1,1)] to a New[origin (0,1),end(1,1)],the tablet stroke still remains next to invisible.
Normally, if the software recognises the MouseStroke it means the machine's hardware is able to compute the stroke realtime but when it does not detect the pressure sensitivity of the tablet ,it does mean that the machine is not able to compute and render the Pressure sensitive stroke realtime.
On disabling pressure sensitivity by changing the PressureCurve to a Flat (0,1)(1,1) this issue is normally solved.
However in this case ,the solution is not working. Is there any other way to completely turnoff pressure sensitivity ?