Can't drag with a second finger while holding down the clickpad (on a Xiaomi 12)

[Steffen Schuhmann]

My touchpad doesn't recoginze any input when the the hardware button (underneath the touchpad) is presssed.

My Laptop model is a xiaome 12.

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: gnome-shell 3.24.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-22.24-generic 4.10.15
Uname: Linux 4.10.0-22-generic x86_64
ApportVersion: 2.20.4-0ubuntu4.1
Architecture: amd64
CurrentDesktop: GNOME
Date: Fri Jun 9 11:29:41 2017
DisplayManager: gdm3
InstallationDate: Installed on 2017-06-08 (0 days ago)
InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Release amd64 (20170412)
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)

[Daniel van Vugt (vanvugt)]

From what I've read this laptop is meant to have a pretty good Synaptics clickpad. Just from what I've read.

Do you experience any similar problem in Unity7, or Windows?

[Steffen Schuhmann (sschuhmann)]

I have tested the click and drag action in an elementary os 0.4 Image I had laying around, which supported the action, but only in the corners of the touchpad though.

Is there an option, which could prevent mouse pointer movement after recognizing a second touch point?

[Daniel van Vugt (vanvugt)]

In Gnome Shell, try this (worked for me):

Install package 'gnome-tweak-tool' and run it ("Tweak Tool"). Then try the different options in:
Keyboard & Mouse > Touchpad > Click Method

I found the default of "Default" didn't work. But changing it to "Fingers" does.

[Steffen Schuhmann (sschuhmann)]

Sadly no option is changing the behaviour of the double input.

* Switched the settings
* Rebooted the system
* Tested the input

# Addition
I may also haven't worked in elementary os, i might have clicked the corner with my fingernail which isn't recognized as input

[Daniel van Vugt (vanvugt)]

The next step would be to find out if this is a kernel bug. Roughly that involves:

sudo apt install evtest
sudo evtest

But I'm not yet sure exactly what information we'd be looking for (there's a lot of information).

[Steffen Schuhmann (sschuhmann)]

I have installed evtest and monitored the touch-drag. So far it looks like some events coming in from the finger movement(there is more output while dragging with a finger).

Is there some data I should provide?

[dino99 (9d9)]

That version is now dead, and there is no answer to #7 since a while

http://news.softpedia.com/news/ubuntu-17-04-zesty-zapus-has-reached-end-of-life-upgrade-to-ubuntu-17-10-now-519360.shtml