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On a acer v3 371 the touchpad stops working after suspend. I can get the touchpad back to work by removing and then enable the i2c_hid module. 
 I type:
"sudo modprobe -r i2c_hid"
"sudo modprobe i2c_hid"

>From /proc/bus/input/devices:
I: Bus=0018 Vendor=06cb Product=2991 Version=0100
N: Name="SYN1B7F:01 06CB:2991 UNKNOWN"
P: Phys=
S: Sysfs=/devices/pci0000:00/INT33C3:00/i2c-7/i2c-SYN1B7F:01/0018:06CB:2991.0002/input/input15
U: Uniq=
H: Handlers=mouse0 event13 
B: PROP=1
B: EV=b
B: KEY=6420 10000 0 0 0 0
B: ABS=260800000000003


Hope this helps a bit! :)

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: xinput 1.6.1-1
ProcVersionSignature: Ubuntu 3.16.0-28.37-generic 3.16.7-ckt1
Uname: Linux 3.16.0-28-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Fri Dec 12 16:13:35 2014
DistUpgraded: Fresh install
DistroCodename: utopic
DistroVariant: ubuntu
EcryptfsInUse: Yes
GraphicsCard:
 Intel Corporation Device [8086:0a2e] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Acer Incorporated [ALI] Device [1025:0918]
InstallationDate: Installed on 2014-12-08 (3 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
MachineType: Acer Aspire V3-371
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-28-generic.efi.signed root=UUID=c404c12a-11b8-47c7-a6bc-24e7a572025b ro i8042.nomux=1 i8042.reset quiet splash vt.handoff=7
SourcePackage: xinput
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/05/2014
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.12
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Aspire V3-371
dmi.board.vendor: Acer
dmi.board.version: V1.12
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.12
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.12:bd09/05/2014:svnAcer:pnAspireV3-371:pvrV1.12:rvnAcer:rnAspireV3-371:rvrV1.12:cvnAcer:ct10:cvrV1.12:
dmi.product.name: Aspire V3-371
dmi.product.version: V1.12
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.56-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.0-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.0-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
xserver.bootTime: Fri Dec 12 16:11:42 2014
xserver.configfile: default
xserver.errors: SYN1B7F:01 06CB:2991 UNKNOWN: Read error 19
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                                4397 
 vendor                                     AUO
xserver.version: 2:1.16.0-1ubuntu1.2

** Affects: linux (Ubuntu)
     Importance: Low
         Status: Incomplete


** Tags: amd64 apport-bug compiz-0.9 ubuntu utopic
-- 
Touchpad stops working after suspend
https://bugs.launchpad.net/bugs/1401935
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