Three finger tap to middle click stopped working

[Rip]

I haven't expereinced this before, though a google search shows complaints from at least 2016.

Three fingers results in a right-click now for whatever reason. I have the appropriate settings enabled in KDE (I haven't changed them).

Middle click works sometimes after restarting the device via xinput, but this is very rare.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: xserver-xorg-input-libinput 0.28.2-2
ProcVersionSignature: Ubuntu 5.0.0-31.33-generic 5.0.21
Uname: Linux 5.0.0-31-generic x86_64
ApportVersion: 2.20.10-0ubuntu27.1
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CurrentDesktop: KDE
Date: Sat Oct 12 03:40:48 2019
DistUpgraded: 2019-04-27 18:56:54,539 DEBUG new topwidget None
DistroCodename: disco
DistroVariant: ubuntu
InstallationDate: Installed on 2018-11-15 (330 days ago)
InstallationMedia: Kubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.2)
MachineType: LENOVO 20AQCTO1WW
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.0.0-31-generic root=/dev/mapper/kubuntu--vg-root ro psmouse.synaptics_intertouch=0 quiet splash vt.handoff=1
SourcePackage: xserver-xorg-input-libinput
UpgradeStatus: Upgraded to disco on 2019-04-27 (167 days ago)
dmi.bios.date: 03/20/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: GJET98WW (2.48 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20AQCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 PRO
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGJET98WW(2.48):bd03/20/2018:svnLENOVO:pn20AQCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20AQCTO1WW:rvrSDK0E50510PRO:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad T440s
dmi.product.name: 20AQCTO1WW
dmi.product.sku: LENOVO_MT_20AQ_BU_Think_FM_ThinkPad T440s
dmi.product.version: ThinkPad T440s
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.97-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 19.0.8-0ubuntu0~19.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 19.0.8-0ubuntu0~19.04.1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.4-1ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.0.1-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20180925-2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

[Naël (nathanael-naeri)]

Hi Rip,

> Three fingers results in a right-click now for whatever
> reason. I have the appropriate settings enabled in KDE
> (I haven't changed them).
>
> Middle click works sometimes after restarting the device
> via xinput, but this is very rare.

If your three-finger taps are inconsistent (sometimes registered as left clicks, sometimes as right clicks, sometimes as middle clicks), it could be related to the following upstream issues:

https://gitlab.freedesktop.org/libinput/libinput/-/issues/361
https://gitlab.freedesktop.org/libinput/libinput/-/issues/473

I am also affected by inconsistent three-finger taps (most often registered as right clicks) on a "SynPS/2 Synaptics TouchPad".