Lenovo Thinkpad Synaptics - 2 finger scroll not working.

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Sashank999:
Hello.

I am a user of Lenovo Thinkpad L412. I currently use touchpad for my daily linux use as my trusty mouse broke recently. I decided to revisit TCL as I had to install a linux distro to get Clickhouse OLAP running locally. But now I found out that 2 finger scroll and double tapping (for left click) does not work.

I have set up all the necessary things as per my choices - Firefox (thanks for the getLatest TCE), Alsa, Ice WM, etc.

From some forum and Google searches, I found a boot code:
psmouse.proto=imps
from:
https://forum.tinycorelinux.net/index.php/topic,6458.msg34363.html#msg34363
https://forum.tinycorelinux.net/index.php/topic,6982.msg36850.html#msg36850

Now this enabled the double tapping for left click. But I still cannot scroll with 2 fingers, as you would normally with a touchpad.

I will be happy to provide any information regarding my device drivers, hardware information or TCL version.

Thanks in advance.

Rich:
Hi Sashank999
I take it you are running Xorg. What does this return:

--- Code: ---sudo libinput list-devices
--- End code ---

Sashank999:

--- Quote from: Rich on November 20, 2024, 02:07:25 PM ---Hi Sashank999
I take it you are running Xorg. What does this return:

--- Code: ---sudo libinput list-devices
--- End code ---

--- End quote ---

Thank you for looking into this.

Here is what I got:

--- Code: ---tc@box:~$ sudo libinput list-devices
Device: Power Button
Kernel: /dev/input/event2
Group: 1
Seat: seat0, default
Capabilities: keyboard
Tap-to-click: n/a
Tap-and-drag: n/a
Tap drag lock: n/a
Left-handed: n/a
Nat.scrolling: n/a
Middle emulation: n/a
Calibration: n/a
Scroll methods: none
Click methods: none
Disable-w-typing: n/a
Disable-w-trackpointing: n/a
Accel profiles: n/a
Rotation: 0.0

Device: Video Bus
Kernel: /dev/input/event6
Group: 2
Seat: seat0, default
Capabilities: keyboard
Tap-to-click: n/a
Tap-and-drag: n/a
Tap drag lock: n/a
Left-handed: n/a
Nat.scrolling: n/a
Middle emulation: n/a
Calibration: n/a
Scroll methods: none
Click methods: none
Disable-w-typing: n/a
Disable-w-trackpointing: n/a
Accel profiles: n/a
Rotation: 0.0

Device: Sleep Button
Kernel: /dev/input/event1
Group: 3
Seat: seat0, default
Capabilities: keyboard
Tap-to-click: n/a
Tap-and-drag: n/a
Tap drag lock: n/a
Left-handed: n/a
Nat.scrolling: n/a
Middle emulation: n/a
Calibration: n/a
Scroll methods: none
Click methods: none
Disable-w-typing: n/a
Disable-w-trackpointing: n/a
Accel profiles: n/a
Rotation: 0.0

Device: AT Translated Set 2 keyboard
Kernel: /dev/input/event3
Group: 4
Seat: seat0, default
Capabilities: keyboard
Tap-to-click: n/a
Tap-and-drag: n/a
Tap drag lock: n/a
Left-handed: n/a
Nat.scrolling: n/a
Middle emulation: n/a
Calibration: n/a
Scroll methods: none
Click methods: none
Disable-w-typing: n/a
Disable-w-trackpointing: n/a
Accel profiles: n/a
Rotation: 0.0

Device: PS/2 Synaptics TouchPad
Kernel: /dev/input/event5
Group: 5
Seat: seat0, default
Capabilities: pointer
Tap-to-click: n/a
Tap-and-drag: n/a
Tap drag lock: n/a
Left-handed: disabled
Nat.scrolling: disabled
Middle emulation: disabled
Calibration: n/a
Scroll methods: *button
Click methods: none
Disable-w-typing: n/a
Disable-w-trackpointing: n/a
Accel profiles: flat *adaptive custom
Rotation: 0.0

--- End code ---

Edit: My laptop has both a touchpad and the "trackpoint" thing so I don't know if they are both being recognized. Mine is a Lenovo ThinkPad L412, Intel Core i3 6th Gen, 4GB RAM.

patrikg:
I think Thinkpads have some kernel mod's to get things working well.
If you try another live linux distro, and do lsmod to see what mod's installed.

GNUser:
Hi Sashank999. I'm on a ThinkPad X230 and two-finger scrolling works for me. I did not do any special configuration for it to work. It seems that if the hardware supports it, libinput can handle it.

Here's what I'm seeing:

--- Code: ---$ sudo libinput list-devices
Device: Power Button
Kernel: /dev/input/event2
Group: 1
Seat: seat0, default
Capabilities: keyboard
Tap-to-click: n/a
Tap-and-drag: n/a
Tap drag lock: n/a
Left-handed: n/a
Nat.scrolling: n/a
Middle emulation: n/a
Calibration: n/a
Scroll methods: none
Click methods: none
Disable-w-typing: n/a
Disable-w-trackpointing: n/a
Accel profiles: n/a
Rotation: 0.0

Device: Video Bus
Kernel: /dev/input/event6
Group: 2
Seat: seat0, default
Capabilities: keyboard
Tap-to-click: n/a
Tap-and-drag: n/a
Tap drag lock: n/a
Left-handed: n/a
Nat.scrolling: n/a
Middle emulation: n/a
Calibration: n/a
Scroll methods: none
Click methods: none
Disable-w-typing: n/a
Disable-w-trackpointing: n/a
Accel profiles: n/a
Rotation: 0.0

Device: Sleep Button
Kernel: /dev/input/event0
Group: 3
Seat: seat0, default
Capabilities: keyboard
Tap-to-click: n/a
Tap-and-drag: n/a
Tap drag lock: n/a
Left-handed: n/a
Nat.scrolling: n/a
Middle emulation: n/a
Calibration: n/a
Scroll methods: none
Click methods: none
Disable-w-typing: n/a
Disable-w-trackpointing: n/a
Accel profiles: n/a
Rotation: 0.0

Device: AT Translated Set 2 keyboard
Kernel: /dev/input/event3
Group: 4
Seat: seat0, default
Capabilities: keyboard
Tap-to-click: n/a
Tap-and-drag: n/a
Tap drag lock: n/a
Left-handed: n/a
Nat.scrolling: n/a
Middle emulation: n/a
Calibration: n/a
Scroll methods: none
Click methods: none
Disable-w-typing: n/a
Disable-w-trackpointing: n/a
Accel profiles: n/a
Rotation: 0.0

Device: SynPS/2 Synaptics TouchPad
Kernel: /dev/input/event4
Group: 5
Seat: seat0, default
Size: 71x31mm
Capabilities: pointer gesture
Tap-to-click: disabled
Tap-and-drag: enabled
Tap drag lock: disabled
Left-handed: disabled
Nat.scrolling: disabled
Middle emulation: disabled
Calibration: n/a
Scroll methods: *two-finger edge
Click methods: *button-areas clickfinger
Disable-w-typing: enabled
Disable-w-trackpointing: enabled
Accel profiles: flat *adaptive custom
Rotation: n/a

Device: TPPS/2 IBM TrackPoint
Kernel: /dev/input/event5
Group: 6
Seat: seat0, default
Capabilities: pointer
Tap-to-click: n/a
Tap-and-drag: n/a
Tap drag lock: n/a
Left-handed: disabled
Nat.scrolling: disabled
Middle emulation: disabled
Calibration: n/a
Scroll methods: *button
Click methods: none
Disable-w-typing: n/a
Disable-w-trackpointing: n/a
Accel profiles: flat *adaptive custom
Rotation: n/a
--- End code ---
I noticed your TouchPad section has this:

--- Code: ---Scroll methods: *button

--- End code ---
whereas mine has this:

--- Code: ---Scroll methods: *two-finger edge

--- End code ---
Maybe your touchpad doesn't support two-finger scrolling?

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