[oi-dev] diagnose touchpad

Udo Grabowski (IMK) udo.grabowski at kit.edu
Wed Feb 16 16:33:20 UTC 2022


On 16/02/2022 17:06, Stephan Althaus wrote:
> Hello!
> 
> I am looking for hints to diagnose the builtin touchpad.
> 
> It should work on the device node  /dev/kdmouse  and the old PS/2 driver 
> mouse8042
> 
> On an older laptop (HP Elitebook 2530p) with OI 2021.10 booted from usb,
> the following dtrace script shows "fbt::mouse8042_intr" events:
> 
> fbt::mouse8042_intr:return,
> fbt::mouse8042_process_msg:return
> {
>      printf("%s returned %d \n", probefunc, arg1);
> }
> 
> on the newer laptop (Dell Precision 7720) there are no events..
> 
> 
> What can i do to dig deeper ?
> 
> 
> Any hints are welcome!
> 
> Stephan

Under Linux, they appear as a I2C HID device.

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