Hi, On Sun, Feb 19, 2017 at 01:07:26PM +0100, H. Nikolaus Schaller wrote: > I don't really remember when we noticed it first. Maybe it was > back in tslib times some years ago where setting the sensitivity > threshold made problems. We then carried along our patch for a > long time in our local repo (and modified it several times) and > only started upstreaming some months ago. [...] > > AFAIK, GIMP and for example https://sourceforge.net/projects/xournal/ appear > to be able to handle X pressure, but I haven't running and tested either one > on our devices. Pressure is used in such drawing tools to simulate that some > physical pens make wider strokes on higher pressure. > > This seems to indicate that X can handle pressure in a non-boolean way, but rarely does. > Especially I think the usual menu, click, drag, scroll gestures are only based > on BTN_TOUCH status and not on ABS_PRESSURE. So it is rarely noticed to make > a difference. ok. > >>> I suggest to put the resistance vs pressure thing in its own patch, > >>> that also fixes tsc200x-core and merge it to linux-next after the > >>> merge window. > > Ok. I will propose a patch. Thanks. I suggest to add this in the patch description: While this patch changes the values reported to userspace, ABS_PRESSURE is used rarely by userspace. Most software only relies on BTN_TOUCH (boolean), which is not affected by this patch. Some graphics software makes use of the interface and does not work correctly with the currently used inverted behaviour. -- Sebastian
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