Touchpad no longer working on Asus Zenbook UX305FA

[barnabear]

I have Ubuntu 15.10 installed, and all was working fine. Then I accepted some software updates and my mouse pointer no longer appears. If I plug in an external USB mouse then all is fine, but I want to use the touchpad - it was working, doesn't now.

cat /proc/bus/input/devices gives me output that includes ...

I: Bus=0011 Vendor=0002 Product=000e Version=0000
N: Name="ETPS/2 Elantech Touchpad"
P: Phys=isa0060/serio4/input0
S: Sysfs=/devices/platform/i8042/serio4/input/input12
U: Uniq=
H: Handlers=mouse0 event5
B: PROP=5
B: EV=b
B: KEY=e420 10000 0 0 0 0
B: ABS=661800011000003

I did find a couple of bug reports for the UX305CA and tried installing the following debs downloaded from http://www.godisbeautiful.net/4.4rc8deb/, but it didn't fix the problem

linux-firmware-image-4.4.0-rc8-touchpad_4.4.0-rc8-touchpad-1_amd64.deb
linux-headers-4.4.0-rc8-touchpad_4.4.0-rc8-touchpad-1_amd64.deb
linux-image-4.4.0-rc8-touchpad_4.4.0-rc8-touchpad-1_amd64.deb
linux-image-4.4.0-rc8-touchpad-dbg_4.4.0-rc8-touchpad-1_amd64.deb
linux-libc-dev_4.4.0-rc8-touchpad-1_amd64.deb

Booting the previous versions of the kernel didn't help. I also tried editing /etc/default/grub to change this line ...

GRUB_CMDLINE_LINUX_DEFAULT="i8042.reset quiet splash"

... and then ran update-grub and reboot, but it didn't make any difference.

Help?

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-29-generic 4.2.0-29.34
ProcVersionSignature: Ubuntu 4.2.0-29.34-generic 4.2.8-ckt3
Uname: Linux 4.2.0-29-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: leigh 1750 F.... pulseaudio
 /dev/snd/controlC0: leigh 1750 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Feb 21 22:25:26 2016
InstallationDate: Installed on 2015-03-20 (338 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 064e:9700 Suyin Corp. Asus Integrated Webcam
 Bus 001 Device 002: ID 8087:0a2a Intel Corp.
 Bus 001 Device 004: ID 046d:c058 Logitech, Inc. M115 Mouse
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: ASUSTeK COMPUTER INC. UX305FA
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-29-generic.efi.signed root=UUID=ee079f66-30dc-483b-bbd4-b6c4fb7578d4 ro i8042.reset quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.2.0-29-generic N/A
 linux-backports-modules-4.2.0-29-generic N/A
 linux-firmware 1.149.3
SourcePackage: linux
UpgradeStatus: Upgraded to wily on 2015-11-26 (86 days ago)
dmi.bios.date: 11/20/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX305FA.204
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX305FA
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX305FA.204:bd11/20/2014:svnASUSTeKCOMPUTERINC.:pnUX305FA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX305FA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: UX305FA
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

[barnabear (barnabear2)]

The hardware works fine under Windows 10 (bleurgh).

[Brad Figg (brad-figg)]

This change was made by a bot.

[barnabear (barnabear2)]

The hardware works fine under Windows 10 (bleurgh).

I had a look through /var/log/Xorg.0.log and found these lines

[ 9.901] (II) config/udev: Adding input device ETPS/2 Elantech Touchpad (/dev/input/event6)
[ 9.901] (**) ETPS/2 Elantech Touchpad: Applying InputClass "evdev touchpad catchall"
[ 9.901] (**) ETPS/2 Elantech Touchpad: Applying InputClass "touchpad catchall"
[ 9.901] (**) ETPS/2 Elantech Touchpad: Applying InputClass "Default clickpad buttons"
[ 9.901] (II) LoadModule: "synaptics"
[ 9.901] (II) Loading /usr/lib/xorg/modules/input/synaptics_drv.so
[ 9.901] (II) Module synaptics: vendor="X.Org Foundation"
[ 9.901] compiled for 1.17.1, module version = 1.8.2
[ 9.901] Module class: X.Org XInput Driver
[ 9.901] ABI class: X.Org XInput driver, version 21.0
[ 9.901] (II) Using input driver 'synaptics' for 'ETPS/2 Elantech Touchpad'
[ 9.901] (**) ETPS/2 Elantech Touchpad: always reports core events
[ 9.902] (**) Option "Device" "/dev/input/event6"
[ 9.972] (II) synaptics: ETPS/2 Elantech Touchpad: found clickpad property
[ 9.972] (--) synaptics: ETPS/2 Elantech Touchpad: x-axis range 0 - 3097 (res 31)
[ 9.972] (--) synaptics: ETPS/2 Elantech Touchpad: y-axis range 0 - 2119 (res 32)
[ 9.972] (--) synaptics: ETPS/2 Elantech Touchpad: pressure range 0 - 255
[ 9.972] (--) synaptics: ETPS/2 Elantech Touchpad: finger width range 0 - 15
[ 9.972] (--) synaptics: ETPS/2 Elantech Touchpad: buttons: left double triple
[ 9.972] (--) synaptics: ETPS/2 Elantech Touchpad: Vendor 0x2 Product 0xe
[ 9.972] (**) Option "SoftButtonAreas" "50% 0 82% 0 0 0 0 0"
[ 9.972] (--) synaptics: ETPS/2 Elantech Touchpad: touchpad found
[ 9.972] (**) ETPS/2 Elantech Touchpad: always reports core events
[ 10.016] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio4/input/input12/event6"
[ 10.016] (II) XINPUT: Adding extended input device "ETPS/2 Elantech Touchpad" (type: TOUCHPAD, id 12)
[ 10.016] (**) synaptics: ETPS/2 Elantech Touchpad: (accel) MinSpeed is now constant deceleration 2.5
[ 10.016] (**) synaptics: ETPS/2 Elantech Touchpad: (accel) MaxSpeed is now 1.75
[ 10.016] (**) synaptics: ETPS/2 Elantech Touchpad: (accel) AccelFactor is now 0.053
[ 10.016] (**) ETPS/2 Elantech Touchpad: (accel) keeping acceleration scheme 1
[ 10.016] (**) ETPS/2 Elantech Touchpad: (accel) acceleration profile 1
[ 10.016] (**) ETPS/2 Elantech Touchpad: (accel) acceleration factor: 2.000
[ 10.016] (**) ETPS/2 Elantech Touchpad: (accel) acceleration threshold: 4
[ 10.016] (--) synaptics: ETPS/2 Elantech Touchpad: touchpad found
[ 10.017] (II) config/udev: Adding input device ETPS/2 Elantech Touchpad (/dev/input/mouse1)
[ 10.017] (**) ETPS/2 Elantech Touchpad: Ignoring device from InputClass "touchpad ignore duplicates"

[barnabear (barnabear2)]

Just found a fix for this ...

In System Settings->Mouse & Touchpad, the Touchpad slider was set to off.

Moving the Touchpad slider to on fixed the problem.

So this is NOT a linux kernel problem, but I think this must have been some sort of upgrade problem - maybe that slider is new and defaults to off - I don't know.

Please triage appropriately - I think there is a bug in that maybe it defaulted/set the slider to off.

Thanks,

Barnabear.