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#1 2024-02-13 13:40:20

merilius
Member
Registered: 2012-06-15
Posts: 48

[SOLVED] [Plasma 6] No touchpad found

My touchpad used to work fine under Plasma 5. I upgraded KDE Plasma to version 6 RC2 from kde-unstable repo.
Since then KDE does not detect my touchpad. "No touchpad found" in Plasma settings.

My touchpad does work in Plasma, but I cannot change "invert scrolling direction" or any other setting, which is annoying.

Installed packages

extra/libinput 1.25.0-1 [installed]
extra/xf86-input-libinput 1.4.0-1 (xorg-drivers) [installed]
extra/xf86-input-synaptics 1.9.2-1 (xorg-drivers) [installed]

libinput detects the touchpad:

Device:           DELL081C:00 044E:121F Touchpad
Kernel:           /dev/input/event11
Group:            6
Seat:             seat0, default
Size:             100x50mm
Capabilities:     pointer gesture
Tap-to-click:     disabled
Tap-and-drag:     enabled
Tap drag lock:    disabled
Left-handed:      disabled
Nat.scrolling:    disabled
Middle emulation: n/a
Calibration:      n/a
Scroll methods:   *two-finger edge 
Click methods:    none
Disable-w-typing: enabled
Disable-w-trackpointing: enabled
Accel profiles:   flat *adaptive custom
Rotation:         n/a

Last edited by merilius (2024-02-13 16:15:09)

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#2 2024-02-13 14:57:20

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 21,616

Re: [SOLVED] [Plasma 6] No touchpad found

Moving to the [testing] subsection...

Generally speaking kde-unstable is a testing repo, so the logical correlation is and has to be that you enable all of the other testing repos as well and do a full system upgrade. If you didn't do that do that reboot and retry.

Other than that start systemsettings in the terminal and post the output.

Random guess, it's quite likely that the synaptics xorg compat got dropped and you still actually using the synaptics backend on xorg by virtue of having that package, what happens if you remove xf86-input-synaptics and reboot/restart Xorg.

https://invent.kde.org/plasma/plasma-de … 0d6823fd90

Last edited by V1del (2024-02-13 15:20:54)

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#3 2024-02-13 16:14:44

merilius
Member
Registered: 2012-06-15
Posts: 48

Re: [SOLVED] [Plasma 6] No touchpad found

Of course I enabled all *-testing repos too when I enabled kde-unstable.

Now when I uninstalled xf86-input-synaptics my touchpad is detected again and I can configure it. You were right, thanks!
This requires fixing plasma 6 packages to conflict with xf86-input-synaptics.

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#4 2024-02-13 16:22:11

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 21,616

Re: [SOLVED] [Plasma 6] No touchpad found

It don't think it needs any fixing. Just because an optional component gets broken by that, you'd not want to force that arbitrarily on people that might have different environments installed. And you generally can still configure all the relevant xorg information via xinput just not via KDE's own GUI.

There should not be many people still relying on xf86-input-synaptics regardless (though I still occasionally lament the loss of a global and widget independent coasting implementation that was possible with synaptics, it's likely generally better for this to get implemented properly and correctly within the toolkits/applications, but I still liked the feature, especially because the way it was implemented meant it even worked on dogshit 2007 touchpads)

Last edited by V1del (2024-02-13 18:15:09)

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