Synaptics s3203 touchpad on Dell XPS12-9Q33 has no working buttons after recent upgrade

[emk2203]

The touchpad buttons don't work anymore after a recent system upgrade. Cursor movement and tap options are unaffected - I get left button functionality with a one-finger tap and right-button functionality with a two-finger tap. Scrolling also works.

Hardware is OK (dual-boot shows that).

xev | grep -i button does not detect button presses, only if done by the tap on the touchpad:

$ xev | grep -i button
ButtonPress event, serial 36, synthetic NO, window 0x4000001,
    state 0x0, button 1, same_screen YES
ButtonRelease event, serial 36, synthetic NO, window 0x4000001,
    state 0x100, button 1, same_screen YES
ButtonPress event, serial 36, synthetic NO, window 0x4000001,
    state 0x0, button 3, same_screen YES
ButtonRelease event, serial 36, synthetic NO, window 0x4000001,
    state 0x400, button 3, same_screen YES

System is running x11, but wayland didn't make a difference.

input: Synaptics s3203 as /devices/pci0000:00/INT33C3:00/i2c-8/i2c-DLL05E3:01/0018:06CB:2734.0002/input/input14

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: xserver-xorg-input-synaptics 1.9.0-1ubuntu1
ProcVersionSignature: Ubuntu 4.11.0-13.19-generic 4.11.12
Uname: Linux 4.11.0-13-generic x86_64
ApportVersion: 2.20.6-0ubuntu5
Architecture: amd64
CurrentDesktop: GNOME
Date: Tue Aug 15 12:59:26 2017
DistUpgraded: 2017-06-08 09:16:23,432 ERROR got error from PostInstallScript ./xorg_fix_proprietary.py (g-exec-error-quark: Kindprozess »./xorg_fix_proprietary.py« konnte nicht ausgeführt werden (Datei oder Verzeichnis nicht gefunden) (8))
DistroCodename: artful
DistroVariant: ubuntu
InstallationDate: Installed on 2017-04-01 (136 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Beta amd64 (20170331)
MachineType: Dell Inc. XPS 12-9Q33
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.11.0-13-generic.efi.signed root=UUID=1551b59c-7fbd-40f7-95c4-47d5359b39dc ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-input-synaptics
UpgradeStatus: Upgraded to artful on 2017-06-08 (68 days ago)
dmi.bios.date: 03/03/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: XPS 12-9Q33
dmi.board.vendor: Dell Inc.
dmi.board.version: A08
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd03/03/2015:svnDellInc.:pnXPS12-9Q33:pvrA08:rvnDellInc.:rnXPS12-9Q33:rvrA08:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: XPS 12-9Q33
dmi.product.version: A08
dmi.sys.vendor: Dell Inc.
peripherals:
 /desktop/gnome/peripherals/Synaptics@32@s3203:
   device_type = touchpad
  /desktop/gnome/peripherals/PS@47@2@32@Synaptics@32@TouchPad:
   device_type = mouse
version.compiz: compiz 1:0.9.13.1+17.10.20170720-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.82-1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.1.4-1ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 17.1.4-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.3-1ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.9.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20170309-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

[Daniel van Vugt (vanvugt)]

Are you sure you have xserver-xorg-input-synaptics installed? Ubuntu 17.10 doesn't ship with it any more.

[Daniel van Vugt (vanvugt)]

Ah, yes. Seems to be there:
[ 6.062] (II) LoadModule: "synaptics"
[ 6.063] (II) Loading /usr/lib/xorg/modules/input/synaptics_drv.so

[[e-mail] (comio)]

Same issue on 18.04 (beta)