https://bugs.kde.org/show_bug.cgi?id=356260

            Bug ID: 356260
           Summary: Huion 610 pro can fill, but brush only paints in brush
                    settings editor preview
           Product: krita
           Version: 2.8.1
          Platform: Debian stable
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: NOR
         Component: Brush engine
          Assignee: [email protected]
          Reporter: [email protected]

I have been using a Wacom tablet successfully, but bought a Huion 610 Pro
yesterday.

If I draw with the trackpad or my Wacom tablet, all is well.

If I draw with the Huion, although the pointer moves and the undo/redo shows a
freehand stroke (or whatever) nothing appears on the canvas. (And if I
subsequently draw with the trackpad, nothing appears until leave the drawing
area and then return - either to select a new colour or off to a different
application window.)

Curiously, if I draw in the brush settings editor's preview area I see the
brush working, complete with pressure behaviour, so the Huion's pressure
information's making it through to that part of Krita. (MyPaint also sees the
pressure information; GIMP doesn't.)

I've just noticed that if I select a colour with the Huion, then try to draw,
that colour is added to the column of recent colours to the side of the
Advanced Colour Selector when the stylus touches the tablet, so I'm guessing
it's resetting the colour at that point - perhaps to transparent? It's not
drawing with the background colour, but it's only the colours I choose as
colours which are added to that 'recent colours'  

Oh, and the fill tool works. So does 'select similar colours', although it only
selects transparent.

Reproducible: Always

Steps to Reproduce:
1. Plug in a Huion 610 pro
2. Draw with a brush
3. See the effect on undo/redo

Actual Results:  
Nothing appears, the 'recent colours' list might be updated if I've tried to
choose a colour.

Expected Results:  
Drawing!

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