Bug 483812 - Touchpad operates normally, but don't show in system settings
Summary: Touchpad operates normally, but don't show in system settings
Status: CONFIRMED
Alias: None
Product: neon
Classification: KDE Neon
Component: Packages User Edition (show other bugs)
Version: unspecified
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Neon Bugs
URL:
Keywords: qt6
Depends on:
Blocks:
 
Reported: 2024-03-17 07:47 UTC by Evgeniy D.
Modified: 2024-04-14 18:32 UTC (History)
6 users (show)

See Also:
Latest Commit:
Version Fixed In:

Attachments
OBSERVED RESULT (36.46 KB, image/png)
2024-03-17 07:47 UTC, Evgeniy D. 		Details
View All Add an attachment

Note You need to log in before you can comment on or make changes to this bug.
Description Evgeniy D. 2024-03-17 07:47:05 UTC 
Created attachment 167359 [details]
OBSERVED RESULT

SUMMARY
Touchpad operates normally, but don't show in system settings. Issue detected after update to Plasma 6


STEPS TO REPRODUCE
1. View system settings -> Mouse & Touchpad -> Touchpad

OBSERVED RESULT
"No touchpad found" message

EXPECTED RESULT
Actual touchpad settings window

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE neon 6.0
(available in About System)
KDE Plasma Version: 6.0.2
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
Comment 1 Frank Kruger 2024-03-17 12:24:17 UTC 
I can confirm this issue for the X11 session, but not with Wayland (openSUSE Tumbleweed with KDE Plasma Version: 6.0.2, KDE Frameworks Version: 6.0.0, Qt Version: 6.6.2).
Comment 3 Frank Kruger 2024-03-17 12:45:39 UTC 
(In reply to Frank Kruger from comment #2)
> Probably due to
> https://invent.kde.org/plasma/plasma-desktop/-/commit/
> 12ac086128c7e7db831f35d53616db0d6823fd90

JFYI: After removing the synaptics touchpad driver, the issue described here (for X11) is solved.
Comment 4 rx312 2024-04-01 12:02:53 UTC 
But libinput driver doesn't support kinetic scroll, only synaptics driver does :(
Comment 5 TraceyC 2024-04-14 18:32:05 UTC 
I can confirm this bug and the fix on my Dell XPS with Solus.

I had xorg-driver-input-synaptics installed because in Plasma 5, it was necessary to enable all options for my touchpad.
After I updated the system to Plasma 6, I had the same symptom as described, in the Touchpad settings I saw "No touchpad found" 

```
❯ kcmshell6 kcm_touchpad
qt.qml.typeresolution.cycle: Cyclic dependency detected between "qrc:/qt/qml/org/kde/desktop/private/TextFieldContextMenu.qml" and "qrc:/qt/qml/org/kde/desktop/MenuItem.qml"
qrc:/libinput/touchpad.qml:691: TypeError: Cannot read property 'supportsScrollFactor' of null
```

After uninstalling xorg-driver-input-synaptics and rebooting, I now see all settings in the Touchpad settings.