My laptop keyboard has a button (fn+f2) which I can use to toggle the touchpad. Using 'xbindkeys -k' to detect the keycode gives "(Scheme function)" m:0x0 + c:199 XF86TouchpadToggle I can toggle the touchpad state once, but after that, I have to plug in or unplug my external mouse to be able to toggle the state of the touchpad again. Using 'qdbus org.kde.keyboard /modules/touchpad org.kde.touchpad.toggle' before triggering this bug works as expected any number of times, but once I trigger the bug, 'qdbus org.kde.keyboard /modules/touchpad org.kde.touchpad.isEnabled' says 'true' even if the touchpad is disabled. If I plug in or unplug my external mouse, 'qdbus org.kde.keyboard /modules/touchpad org.kde.touchpad.isEnabled' gives the correct status. Once I trigger the bug, the qdbus command to toggle the touchpad state also does not work. I could not find any messages which seemed relevant in my system logs. Software versions: Distro: Arch Linux Plasma 5.10.2 Qt 5.9.0 KDE frameworks 5.35.0 KDE applications 17.04.2
Created attachment 106133 [details] Output of various commands Additional info: 'qdbus org.kde.keyboard /modules/touchpad org.kde.touchpad.enable' allows me to enable the touchpad even after triggering the bug. Output of the commands (with comments) has been added as an attachment. I also forgot to mention that I have 'disable touchpad when mouse is plugged in' and 'disable touchpad while typing' disabled.
*** This bug has been marked as a duplicate of bug 370588 ***