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Two finger scroll stops working suddenly

asked 2017-09-13 01:17:33 +0000

Koen gravatar image

updated 2017-09-14 02:31:41 +0000

Hi!

Here I am, happily browsing the web, while suddenly... two finger scrolling stops working on my touchpad! I can't find an easy way to make it come back:

  1. Toggling the touchpad settings a few times doesn't work (while i can get edge scrolling to work)

  2. Logging out and back in again doesn't work, even switching from Wayland to Xorg and back again.

  3. Rebooting solves the problem.

Happened a few times (not often, say a few time every week) at unpredictable intervals. It's no fun having to reboot to fix this :(

Here is info about my system:

  • OS: Fedora 26, up to date

  • Desktop environment: Gnome

  • Display server: Wayland

Relevant output of "sudo libinput list-devices":

Device:           SynPS/2 Synaptics TouchPad
Kernel:           /dev/input/event16
Group:            8
Seat:             seat0, default
Size:             100x76mm
Capabilities:     pointer 
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
Accel profiles:   none
Rotation:         n/a

Could anyone help me troubleshoot this issue? This time, I am determined not to reboot before I can actually fix it, and hopefully prevent future occurances, or maybe find a way to reproduce the issue and submit a bug report.

Cheers,

Koen

Edit: It looks like two finger scroll actually stops workings sometime when my laptop wakes up from suspend. It has happened 2-3 times already today. Once, the entire touchpad stopped working, and the only option was to reboot.

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Comments

It sounds like it might be a hardware problem. Did you try checking in the logs to see if there are any relevant messages around the time it stopped working?

Samuel Sieb ( 2017-09-15 00:40:51 +0000 )edit

2 answers

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answered 2017-11-16 13:09:28 +0000

Soren gravatar image

The problem persists in F27. Need much force to scroll with two fingers.

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answered 2017-09-14 08:48:03 +0000

Try to remove touch pad's module and add it again:

  • Go to another console (e.g. Crtl+Alt+F5)

  • run this commands:

(as root)

modprobe -r psmouse
modprobe psmouse
  • and go back to the X session, press (Ctrl-Alt-F2)

Based on the kernel you use, above commands may not work, because psmouse is a builtin module in current kernel. If you face with

modprobe: FATAL: Module psmouse is builtin.

try:

  • switching to a console and back again
  • sleep you laptop and resuming again
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Asked: 2017-09-13 01:17:33 +0000

Seen: 136 times

Last updated: Sep 14