Hi Ferenc.
Tried your method. In /tmp/dsdt.dsl I found the HID of the touchpad: 0633 (!)

If ((TPTY == One))
{
   _HID = "ELAN0633"
   BADR = 0x15
   HID2 = One
   Return (Zero)
}

But then there is no "TPVD" to be found in the whole file. When
searching for "_STA" I find

Method (_STA, 0, NotSerialized)  // _STA: Status
{
   If ((TPTY == Zero))
   {
      Return (Zero)
   }
   Else
   {
      Return (0x0F)
   }
}

Can you please help?

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https://bugs.launchpad.net/bugs/1861610

Title:
  'Elan touchpad' not detected on 'Lenovo ThinkBook 15 IIL'

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