Created attachment 102837 [details] DebugView Log Hi, I've trier krita for the first time this week, the software worked very well the very first time ( could draw for 3-4 hour), but after my reboot the next day, my tablet started to behave strangely with krita : the pressure don't work anymore, on the viewport if I get my pen away of my tablet and hover it again over the viewpot, krita don't recognise the movement anymore. The pen only work on the user interface area ( I can move freely and click on every button without the tablet to do weird thing). the pressure work correctly on other paint software. I'm using windows 10, with a wacom bamboo pen & touch. wacom driver are up to date, krita reinstalled multiple time, configuration cleaned up several time, opengl disabled.
I add this comment to update my bug : I though my 4 monitor setup could have something to do with this bug, so I did different step in order to understand why my bug is happening. I first rebooted my computer with only 1 of my monitor, then started krita, as soon as I tried my tablet this popup appeared on krita : http://droplr.epixerion.com/VNQz/27vcZD81 choosing the second option made krita work as expected, as well as the first one. ------ for my second test, I plugged back all my monitor after restarting my computer, this time, when I launched krita, the same popup appeared (that popup never happened before I tried to unplug 3 of my monitor) with different value : http://droplr.epixerion.com/nCWY/12U4lMk7 If I choose the second option (selected by default), krita work as expected, my tablet work, and i get the pressure sensitivity back. If i use the first option (wintab), I can only draw on 1/4 of the viewport on krita (eg : http://droplr.epixerion.com/9OWl/1kYoYKZT). I cannot say what is really happening, but I hope these test could help you find a solution, I have to point out the very first time I launched krita, none of this popup window or bug happened at all (everything started after my reboot).
You probably have to reset your wacom settings. Wacom can get very confused with a multi-monitor setup. See: https://docs.krita.org/KritaFAQ#How_to_fix_a_tablet_offset_on_multiple_screen_setup_on_Windows . We recently had another report very similar to yours -- it seems as if the screen krita is on only gets mouse events, from your tablet log. A tablet sends for every position the stylus is in two events: one claiming it's a stylus, one claiming it's a mouse. I suspect that other applications take the x, y coordinates of the mouse event, because that apparently is more dependable than the x, y coordinates of the stylus event, even though it lacks the precision of the stylus... We're considering doing the same thing, but haven't managed to do that yet -- until now we're trusting the tablet driver to give us correct tablet events...