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["@pjf" <paul.j.fenwick@xxxxxxxxx>]

Update!

My trackpad works, and I don't know why. ;(

In particular, we're now seeing a ETPS/2 Elantech Touchpad in xinput,
which wasn't there when I reported yesterday:

~$ xinput | head -4
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ Sunrex/JME Ghost Key Elimiantion Keyboard	id=13	[slave  pointer  (2)]
⎜   ↳ ETPS/2 Elantech Touchpad                	id=15	[slave  pointer  (2)]

I'm running a 4.4.0 kernel:

~$ uname -a
Linux qapla 4.4.0-22-generic #40~14.04.1-Ubuntu SMP Fri May 13 17:27:45 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

My suspicion (based upon folks with Elantech touchpads messing with
i8042 resets) is that my machine came directly from cold-boot to Linux
today, whereas the touchpad yesterday had been after multiple reboots
where I wrenched a disk from using legacy BIOS booting to UFI booting.

I shall continue to report as I learn more. :)

-- 
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https://bugs.launchpad.net/bugs/1526393

Title:
   ASUS ROG G752 TouchPad not detected

Status in linux package in Ubuntu:
  Expired

Bug description:
  Laptop Model :  ASUS ROG G752VT-DH72
  First Appearance :  I got two ASUS ROG G752 laptops yesterday afternoon. Installed Ubuntu 14.04.03 with pre-installed Windows 10. Both two laptops can not detect launchpad.
  Manufacturer : ASUSwith

  *xinput list

  xinput list
  ⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
  ⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
  ⎜   ↳ Sunrex/JME Ghost Key Elimiantion Keyboard	id=10	[slave  pointer  (2)]
  ⎜   ↳ ASUS Tech Inc. ASUS HID Device          	id=13	[slave  pointer  (2)]
  ⎜   ↳ ASUS Tech Inc. ASUS HID Device          	id=14	[slave  pointer  (2)]
  ⎜   ↳ Microsoft Microsoft 5-Button Mouse with IntelliEye(TM)	id=12	[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)]
      ↳ Sleep Button                            	id=8	[slave  keyboard (3)]
      ↳ Sunrex/JME Ghost Key Elimiantion Keyboard	id=9	[slave  keyboard (3)]
      ↳ USB2.0 HD UVC WebCam                    	id=11	[slave  keyboard (3)]
      ↳ Asus WMI hotkeys                        	id=15	[slave  keyboard (3)]
      ↳ AT Translated Set 2 keyboard            	id=16	[slave  keyboard (3)]

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.19.0-25-generic 3.19.0-25.26~14.04.1 [modified: boot/vmlinuz-3.19.0-25-generic]
  ProcVersionSignature: Ubuntu 3.19.0-25.26~14.04.1-generic 3.19.8-ckt2
  Uname: Linux 3.19.0-25-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Tue Dec 15 10:37:27 2015
  InstallationDate: Installed on 2015-12-14 (1 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  SourcePackage: linux-lts-vivid
  UpgradeStatus: No upgrade log present (probably fresh install)
  --- 
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  logan      1976 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=d21349d4-a2e3-4591-8888-a533881af2e8
  InstallationDate: Installed on 2015-12-14 (3 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  MachineType: ASUSTeK COMPUTER INC. G752VT
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-39-generic.efi.signed root=UUID=feeb3b62-a26b-486a-bba9-8f4eedd0f6df ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-39.44~14.04.1-generic 3.19.8-ckt9
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-39-generic N/A
   linux-backports-modules-3.19.0-39-generic  N/A
   linux-firmware                             1.127.19
  Tags:  trusty
  Uname: Linux 3.19.0-39-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 09/23/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: G752VT.205
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: G752VT
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: ATN12345678901234567
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrG752VT.205:bd09/23/2015:svnASUSTeKCOMPUTERINC.:pnG752VT:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnG752VT:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: G752VT
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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