Touchpad is not detected in Acer Aspire One AO756-2626

[Josh Nightingale]

After most recent update to kernel, my touchpad is not recognised and does not appear as an input device in cat /proc/bus/input/devices

An external USB mouse is working correctly (cursor, buttons and scroll wheel)

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-59-generic 4.4.0-59.80
ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35
Uname: Linux 4.4.0-59-generic i686
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: josh 1777 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon Jan 23 09:12:32 2017
HibernationDevice: RESUME=UUID=9aee6652-765c-4b42-9ffd-9370a0d95ca1
MachineType: Acer AO756
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-59-generic root=UUID=a872dd55-2af1-4efd-b447-ec434bff8dcf ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-59-generic N/A
 linux-backports-modules-4.4.0-59-generic N/A
 linux-firmware 1.157.6
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-08-30 (146 days ago)
dmi.bios.date: 11/06/2012
dmi.bios.vendor: Acer
dmi.bios.version: V2.08
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: Mimic
dmi.board.vendor: Acer
dmi.board.version: Type2 - Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V2.08
dmi.modalias: dmi:bvnAcer:bvrV2.08:bd11/06/2012:svnAcer:pnAO756:pvrV2.08:rvnAcer:rnMimic:rvrType2-BoardVersion:cvnAcer:ct10:cvrV2.08:
dmi.product.name: AO756
dmi.product.version: V2.08
dmi.sys.vendor: Acer

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Does this bug go away if you boot back into the prior kernel version?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.10 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.10-rc5

[Josh Nightingale (jnightingale3)]

Thanks Joseph.

The problem persists if I boot into 4.2.7 or into 4.10.0

Sorry for the delay - hectic week!

Cheers,

Josh

[Josh Nightingale (jnightingale3)]

Updated to 16.10 Yakkety-Yak and touchpad has started working again - no idea what fixed it though!