Latitude 7400: trackpad issues

[Hpbrown]

Hi
I''ve done further testing on my Latitude 7400 which works almost perfectly except the TouchPad.
When using Voodoo PS2, the TouchPad works as a mouse, buttons are functional, drag & drop OK but unfortunately not the 2 or 3 finger gestures
I've tried then to test HID and follow the guide https://voodooi2c.github.io
using SSDT patching:

External (GPHD, FieldUnitObj)
Scope (\)
{
    If (_OSI ("Darwin"))
    {
        GPHD = 0x0F
    }
    Else
    {

the TouchPad is now functional with 2/3 finger gestures, scrolling OK..but unfortunately not the drag & drop or buttons.

 

is there any idea to improve this.? did I miss anything?

[ShadowMinhja]

If anyone here still struggling, I got my 7490 trackpad working great now!  I posted my EFI in this other thread which helped me resolve the issues.  Hopefully since the 7490 and 7400 are really close, it might help.

 

https://osxlatitude.com/forums/topic/13361-dell-latitude-7490-opencore-bootloader-buggy-trackpad-support-request/page/2/