Random right click behaviour with synaptics touchpad

[John McCaul]

Tap to click with Synaptics touchpad appears to have developed a problem in Ubuntu Budgie 18.04 beta-1 that was not in the alpha. When using the touchpad to click links (and occasionally drag windows) the right-click context menu appears. Changing all the touchpad settings in Control Centre has no effect on the problem. System has been re-installed twice to ensure it was not an installation issue.

Version: Ubuntu Budgie 18.04 Beta-1
Platform: x86 (32bit)

[fossfreedom (fossfreedom)]

This sounds like a regression with the libinput package so I have tagged this.

Please download and install the beta 2 candidate ISO to see if you can reproduce this issue.

http://cdimage.ubuntu.com/ubuntu-budgie/daily-live/current/

[John McCaul (joethebrit)]

This issue is still present in Beta-2 (32 bit).

[John McCaul (joethebrit)]

Please note that this behaviour is not found in the Xubuntu Beta (installed 2018-04-05) which has the same libinput (libinput-bin & libinput10) packages as those in Ubuntu Budgie Beta 1 & 2.

[fossfreedom (fossfreedom)]

hmmm - what if you install gnome-shell (sudo apt install ubuntu-desktop). Given that budgie uses GNOME components we need to try to narrow down where the issue is coming from.

I note you are using 32bit - does the issue also occur on the 64bit Ubuntu ISO / 64bit Ubuntu Budgie ISO?

[John McCaul (joethebrit)]

Installed GNOME shell - no change.

The hardware (Samsung n-130) cannot handle 64-bit.

On Kubuntu 18.04 beta, if tap-to-click is enabled the same behaviour occurs: the touchpad appears to be intermittently unable to differentiate between a single finger tap and a two finger tap when single finger tapping; it does not have the reverse problem, two finger taps are never mistaken for single finger taps. Occasionally the secondary context menu appears when merely moving the pointer.

As I generally don't use tap-to-click for right click (two-finger-tap) it struck me that if I could turn off two finger tapping or change the response to a two finger tap from right to left click using the libinput settings I would be able to effectively avoid the problem. I know it is possible to change the response to 1,2,3 clicks from l,r,m to l,m,r but don't know if it's possible to change it to l,l,l.

[fossfreedom (fossfreedom)]

this? http://who-t.blogspot.in/2018/04/gnome-328-uses-clickfinger-behaviour-by.html

On 9 April 2018 at 01:33, John McCaul <email address hidden> wrote:
> Installed GNOME shell - no change.
>
> The hardware (Samsung n-130) cannot handle 64-bit.
>
> On Kubuntu 18.04 beta, if tap-to-click is enabled the same behaviour
> occurs: the touchpad appears to be intermittently unable to
> differentiate between a single finger tap and a two finger tap when
> single finger tapping; it does not have the reverse problem, two finger
> taps are never mistaken for single finger taps. Occasionally the
> secondary context menu appears when merely moving the pointer.
>
> As I generally don't use tap-to-click for right click (two-finger-tap)
> it struck me that if I could turn off two finger tapping or change the
> response to a two finger tap from right to left click using the libinput
> settings I would be able to effectively avoid the problem. I know it is
> possible to change the response to 1,2,3 clicks from l,r,m to l,m,r but
> don't know if it's possible to change it to l,l,l.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1760975
>
> Title:
> Random right click behaviour with synaptics touchpad
>
> Status in Ubuntu Budgie:
> New
> Status in xserver-xorg-input-libinput package in Ubuntu:
> New
>
> Bug description:
> Tap to click with Synaptics touchpad appears to have developed a
> problem in Ubuntu Budgie 18.04 beta-1 that was not in the alpha. When
> using the touchpad to click links (and occasionally drag windows) the
> right-click context menu appears. Changing all the touchpad settings
> in Control Centre has no effect on the problem. System has been re-
> installed twice to ensure it was not an installation issue.
>
> Version: Ubuntu Budgie 18.04 Beta-1
> Platform: x86 (32bit)
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntubudgie/+bug/1760975/+subscriptions

[John McCaul (joethebrit)]

The basic GNOME settings, found in org.gnome.desktop.peripherals.touchpad, can be changed using cli or dconf but have no effect.

[John McCaul (joethebrit)]

The latest round of updates, including libinput 1.10.4-1, have either solved the problem or reduced its occurrence to the level where it is no longer frequent enough to be noticeable on Ubuntu Budgie 18.04.

[John McCaul (joethebrit)]

The problem also no longer occurs in Ubuntu Mate 18.04 beta 32-bit after latest round of updates.

[fossfreedom (fossfreedom)]

Thanks John for the confirmation

[yolen (plasmajens)]

I have had this problem since upgrading to 18.04. I am on a lenovo x260. I could not solve it so i disabled my touchpad in the BIOS. Recently I tried to reenable the touchpad and to my surprise it worked again. However, since I updated my system last week the error is back. Very frequent, random rightclicks which makes the system completely useless. I just disabled the touchpad again and carry a mouse with me everywhere I go :-)