Re: Dell latitude 7490 touchpad support?

On Saturday, September 29, 2018, 8:48 PM (UTC+0100), Johannes Lundberg <johalun0_at_gmail.com> wrote:
> Hi
> 
> I just got a new work laptop and the touchpad does not work. Some
> information points to that this machine has a Microsoft precision touchpad.
> I can't see any USB device so I'm wondering if this is an I2C device?
> 
> Do we have any driver for this?
> 
> /Johannes
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Hi,

I am also interested in this issue (broadly), as my laptop (Acer Aspire E5-575) has Synaptics one in it.

By factory default setting, the touchpad is not detected at all even if I have `ig4_load="YES"` in `/boot/loader.conf`. However, when I switch the touchpad option in BIOS from 'Advanced' to 'Basic,' kernel started to see it as `psm0: model Synaptics Touchpad, device ID 0`. Hence I am using it under 'Basic' mode for now.

(might not be related to the above) Also, this laptop also has a key combo (fn + F7) to enable/disable the touchpad; while the key combo does work on killing or reviving touchpad, kernel spits these messages every time I do that:
```
acpi_ec0: EcCommand: no response to 0x84
acpi_ec0: EcCommand: no response to 0x84
acpi_ec0: GPE query failed: AE_NO_HARDWARE_RESPONSE
```
So my understanding is that the `acpi_ec` driver expects something from hardware in return to a probing but could not get what it wants? I have no clue at all as I could not find any info on `acpi_ec`. Can anyone tell me what is happening? I'm running amd64 r339274 at the moment.

Thank you,
-- 
Hyun Hwang