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[Bug 1594214] [NEW] ETPS/2 Elantech Touchpad inconsistently detected (Gigabyte P57W laptop)


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On my Gigabyte P57W laptop the ETPS/2 Elantech touchpad is
inconsistently detected at boot. Trying mainline 4.6 kernel did not

WORKAROUND: Add kernel boot parameter:

The device is id=17 on xinput below:
$ xinput

⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ Kingsis Peripherals  Evoluent VerticalMouse 3 	id=12	[slave  pointer  (2)]
⎜   ↳ Sunrex/JME Ghost Key Elimiantion Keyboard	id=14	[slave  pointer  (2)]
⎜   ↳ ETPS/2 Elantech Touchpad                	id=17	[slave  pointer  (2)]
⎣ Virtual core keyboard                   	id=3	[master keyboard (2)]
    ↳ Virtual core XTEST keyboard             	id=5	[slave  keyboard (3)]
    ↳ Power Button                            	id=6	[slave  keyboard (3)]
    ↳ Video Bus                               	id=7	[slave  keyboard (3)]
    ↳ Video Bus                               	id=8	[slave  keyboard (3)]
    ↳ Sleep Button                            	id=9	[slave  keyboard (3)]
    ↳ Power Button                            	id=10	[slave  keyboard (3)]
    ↳ Sleep Button                            	id=11	[slave  keyboard (3)]
    ↳ Sunrex/JME Ghost Key Elimiantion Keyboard	id=13	[slave  keyboard (3)]
    ↳ Chicony USB 2.0 Camera                  	id=15	[slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard            	id=16	[slave  keyboard (3)]

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-4.4.0-24-generic 4.4.0-24.43~14.04.1
ProcVersionSignature: Ubuntu 4.4.0-24.43~14.04.1-generic 4.4.10
Uname: Linux 4.4.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
Date: Mon Jun 20 10:56:33 2016
InstallationDate: Installed on 2014-05-20 (761 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: linux-lts-xenial
UpgradeStatus: No upgrade log present (probably fresh install)

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

** Tags: amd64 apport-bug third-party-packages trusty
ETPS/2 Elantech Touchpad inconsistently detected (Gigabyte P57W laptop)
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