on neon dev unstable start wayland session open system settings > input devices > touchpad check "Press left and right buttons for middle click" click "apply" button and close the window reopen system settings > input devices > touchpad "Press left and right buttons for middle click" is unchecked again
Still reproducible on neon dev unstable.
Can reproduce under mouse settings as well, so this is not exclusive to the touchpad KCM. I'm on KDE Neon Git Stable (the 5.14.90 beta), also under Wayland session. Additionally, ticking its box does not make the "Apply" button clickable, unlike all other options with tickboxes.
(In reply to Thiago Sueto from comment #2) > Can reproduce under mouse settings as well, so this is not exclusive to the > touchpad KCM. I can confirm. Operating System: Arch Linux KDE Plasma Version: 5.15.0 KDE Frameworks Version: 5.55.0 Qt Version: 5.12.1
Bug persists. Operating System: Arch Linux KDE Plasma Version: 5.15.2 KDE Frameworks Version: 5.55.0 Qt Version: 5.12.1
Plasma 5.16 beta has the same bug. SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.15.90 KDE Frameworks Version: 5.58.0 Qt Version: 5.13.0 beta3
The same bug affects Mouse kcm on X11.
This bug persists. Operating System: Arch Linux KDE Plasma Version: 5.16.5 KDE Frameworks Version: 5.61.0 Qt Version: 5.13.1
I don't reproduce this bug with Plasma 5.19 from sources. Operating System: Kubuntu KDE Plasma Version: 5.18.80 KDE Frameworks Version: 5.68.0 Qt Version: 5.12.4 Patrick do you still reproduce with Plasma 5.18 or newer ?
On Arch Linux running Plasma 5.18.3 with a mouse I not even can check "Press left and right buttons for middle click" because "Apply" button is not enabled. On Neon unstable this bug is still reproducible with touchpad and mouse. Operating System: KDE neon Unstable Edition KDE Plasma Version: 5.18.80 KDE Frameworks Version: 5.69.0 Qt Version: 5.14.1
Could it be your hardware or libinput does not support this on your platform ? This would explain the issue of the setting not being saved. Could you find out if that is the case : $ qdbus --print-reply org.kde.KWin /org/kde/KWin/InputDevice/event4 org.freedesktop.DBus.Properties.Get org.kde.KWin.InputDevice supportsMiddleEmulation You may need to adapt the query in particular the event4 to correspond to your touchpad You can use query such as : qdbus --print-reply org.kde.KWin /org/kde/KWin/InputDevice/event4 org.freedesktop.DBus.Properties.Get org.kde.KWin.InputDevice name Or you can use qbusviewer for instance If so I just merged a fix, that will make the UI reflect the fact the feature is not supported by a device. https://phabricator.kde.org/D28297 This will be part of Plasma 18.04.
output of $ qdbus --print-reply org.kde.KWin /org/kde/KWin/InputDevice/event7 org.freedesktop.DBus.Properties.Get org.kde.KWin.InputDevice supportsMiddleEmulation is "false". (In reply to Méven Car from comment #10) > If so I just merged a fix, that will make the UI reflect the fact the > feature is not supported by a device. https://phabricator.kde.org/D28297 > This will be part of Plasma 18.04. did you mean it will be part of Plasma 5.18.4? "Press left and right buttons for middle click" is already greyed out on Neon unstable.
Yes I meant Plasma 5.18.4. Well neon might have already the patch. (when something hits the next stable branch we land the changes to master as well) So I guess this bug can be considered fixed.
State of "Press left and right buttons for middle click" setting of Mouse KCM is saved and such feature works as expected on both X11 and Wayland sessions of Neon unstable. Therefore, this bug is really fixed. Thank you very much Méven. Maybe you can take a look on these other Touchpad KCM bugs: bug 408116 bug 408338