https://bugs.kde.org/show_bug.cgi?id=498937
--- Comment #4 from junksmith...@gmail.com --- Another small update (especially for anyone who also has Wacom Tablet issues after attempting calibration in Plasma): Following https://forum.endeavouros.com/t/reset-pen-tablet-calibration/64464/7, I'm able to determine that Plasma creates a file (~/.config/kcminputrc) whenever the drawing tablet is calibrated; if the file doesn't exist, then it's using the default settings. By deleting this file, logging out, logging back in, and mapping the drawing area only to the tablet display, the tablet is more-or-less working as intended, obviously without the minor adjustments of proper calibration. This also explains the tablet works properly in Gnome (which doesn't use that kcminputrc file) or on a new user account (which isn't calibrated and is using default settings). The problem still arises when I try to calibrate the pen (on both the new or primary user accounts). The same visual glitch happens (as shown above), while, the calibration GUI does not proceed with pen inputs, and if the process is terminated (e.g. closing the settings window), a "~/.config/kcminputrc" file will be made with a calibration matrix that seems incorrectly mapped. Subsequent attempts to calibrate the pen won't work; the tablet seems to be using this screwed-up calibration matrix for inputs instead of the default as the point of reference, making proper pen inputs impossible to perform recalibration. The only remedy I found is as above: delete the kcminputrc file and reboot. Otherwise, here's the calibration matrix after attempting calibration in the Drawing Tablet settings GUI: CalibrationMatrix=9.5367431640625e-07,5.364418029785156e-07,1.9402554649744497e-12,0,1.2715657248918433e-05,7.152557373046875e-06,3.44934280790965e-12,0,0,0,1,0,0,0,0,1 I have limited understanding of matrices and how they're applied, but I think this reflects a heavy amount of x and y-axis compression, which is consistent with how the tablet improperly functioned after calibration. If that's true, it's hard to know if this improper calibration was due to the GUI's visual glitching/unresponsiveness leading to user-input-errors, or if it's a code-side bug. So there some progress on the actual function fo the tablet, but the I still have no idea where that visual glitch comes from or how to fix it. -- You are receiving this mail because: You are watching all bug changes.
