I also have this issue. The pointer becomes frozen about 1-2 sec, at this time, it can move, but no actions work. My laptop: Xiaomi Mi Notebook Pro rev.2 

any touch on the touchpad generates a bunch of errors:

i2c_hid i2c-ETD2303:00: i2c_hid_get_input: incomplete report (14/65535)


This issue is relevant for kernel version 4.20.13. OS: Arch linux.

xinput list
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ ETD2303:00 04F3:3083 Touchpad             id=11   [slave  pointer  (2)]
⎜   ↳ ETPS/2 Elantech Touchpad                  id=14   [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)]
    ↳ Power Button                              id=8    [slave  keyboard (3)]
    ↳ Video Bus                                 id=9    [slave  keyboard (3)]
    ↳ XiaoMi USB 2.0 Webcam: XiaoMi U           id=10   [slave  keyboard (3)]
    ↳ Intel HID events                          id=12   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=13   [slave  keyboard (3)]


Device:           ETD2303:00 04F3:3083 Touchpad
Kernel:           /dev/input/event6
Group:            6
Seat:             seat0, default
Size:             125x78mm
Capabilities:     pointer gesture
Tap-to-click:     disabled
Tap-and-drag:     enabled
Tap drag lock:    disabled
Left-handed:      disabled
Nat.scrolling:    disabled
Middle emulation: disabled
Calibration:      n/a
Scroll methods:   *two-finger edge 
Click methods:    *button-areas clickfinger 
Disable-w-typing: enabled
Accel profiles:   none
Rotation:         n/a

Device:           ETPS/2 Elantech Touchpad
Kernel:           /dev/input/event9
Group:            10
Seat:             seat0, default
Size:             125x81mm
Capabilities:     pointer gesture
Tap-to-click:     disabled
Tap-and-drag:     enabled
Tap drag lock:    disabled
Left-handed:      disabled
Nat.scrolling:    disabled
Middle emulation: disabled
Calibration:      n/a
Scroll methods:   *two-finger edge 
Click methods:    *button-areas clickfinger 
Disable-w-typing: enabled
Accel profiles:   none
Rotation:         n/a


journalctl -b | grep i2c | grep -v 'incomplete report'

мар 05 01:25:42 KarmicMiBook kernel: i2c_hid i2c-ETD2303:00: i2c-ETD2303:00 supply vdd not found, using dummy regulator
мар 05 01:25:42 KarmicMiBook kernel: i2c_hid i2c-ETD2303:00: Linked as a consumer to regulator.0
мар 05 01:25:42 KarmicMiBook kernel: i2c_hid i2c-ETD2303:00: i2c-ETD2303:00 supply vddl not found, using dummy regulator
мар 05 01:25:42 KarmicMiBook kernel: input: ETD2303:00 04F3:3083 Mouse as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-1/i2c-ETD2303:00/0018:04F3:3083.0001/input/input8
мар 05 01:25:42 KarmicMiBook kernel: input: ETD2303:00 04F3:3083 Touchpad as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-1/i2c-ETD2303:00/0018:04F3:3083.0001/input/input10
мар 05 01:25:42 KarmicMiBook kernel: hid-generic 0018:04F3:3083.0001: input,hidraw0: I2C HID v1.00 Mouse [ETD2303:00 04F3:3083] on i2c-ETD2303:00
мар 05 01:25:42 KarmicMiBook kernel: input: ETD2303:00 04F3:3083 Touchpad as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-1/i2c-ETD2303:00/0018:04F3:3083.0001/input/input13
мар 05 01:25:42 KarmicMiBook kernel: hid-multitouch 0018:04F3:3083.0001: input,hidraw0: I2C HID v1.00 Mouse [ETD2303:00 04F3:3083] on i2c-ETD2303:00