Hi guys,
glad to inform that touchpad now is working on Teclast F7 running Xubuntu 18.04
It is just temporary workaround, hope it will added to default kernel.

All you need to do is patch kernel with that file
https://github.com/brotfessor/sipodev/tree/master/b


1. Add needed packages before compiling kernel
sudo apt-get update
sudo apt-get build-dep linux
sudo apt-get install kernel-package
sudo apt-get install libncurses5-dev
sudo apt-get install libgtk2.0-dev libglib2.0-dev libglade2-dev
sudo apt-get install patch dpkg-dev


2. Download kernel sources 
apt-get source linux-image-`uname -r`


3. Enter kernel folder and do config
cd linux-4.15.0/
make oldconfig

4. Replace original i2c-hid.c with one downloaded from github

mine located here
/home/teclast/linux-4.15.0/drivers/hid/i2c-hid/i2c-hid.c


5. Build kernel.This proccess might take over 1 hour
fakeroot make-kpkg -j 5 --initrd --append-to-version=-custom kernel_image 
kernel_headers


6. Compiled kernel will be located in home folder. Jump to it and install
dpkg -i *.deb

7. Update grup and reboot. You should have working touchpad now.
sudo update-grub

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1728244

Title:
  Touchpad stops working after reboot on Apollo Lake

Status in Linux:
  Unknown
Status in linux package in Ubuntu:
  Triaged

Bug description:
  On the Jumper EZBook 3 Pro (V4) laptop, using an Apollo Lake N3450
  processor, if you install Ubuntu 17.10 (or less) with isorespin and
  use rEFInd as bootloader (this is the only way to get linux booting on
  this laptop) everything works out of the box, but after a reboot or
  two the touchpad stops working. Both in Ubuntu and Windows 10. The
  only way to restore functionality is to boot from usb key ubuntu 17.10
  respined, or disassemble laptop and detach-reattach battery cable.
  This is mesg | grep i2c_hid:

  
  [ 2056.460636] i2c_hid i2c-SYNA3602:00: i2c_hid_get_input: incomplete report 
(27/34)
  [ 3077.604699] i2c_hid i2c-SYNA3602:00: failed to reset device.
  [ 3077.605473] dpm_run_callback(): i2c_hid_resume+0x0/0xe0 [i2c_hid] returns 
-61
  [ 3080.468156] i2c_hid i2c-SYNA3602:00: i2c_hid_get_input: incomplete report 
(27/34)

  
  uname -rvps
  Linux 4.10.0-32-generic #36~16.04.1-Ubuntu SMP Wed Aug 9 09:19:02 UTC 2017 
x86_64

  There has to be a bug in the kernel. Any way to avoid this?

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