[ltp] No touchpad with latest BIOS?

[Hunter Fuller]

On  30 May 2006, at 4:05 PM, Richard wrote:

>
>
>
> As I understand it, the trackpoint is connected in "series" with  
> the touchpad, and the synaptics controller handles both of them.   
> THe synaptics controller is mounted physically on the same PCB as  
> the touchpad.
>
>              TPAD
>               |
> TPOINT ----SYNAPTICS---MOTHERBOARD
This is incorrect. I'm not sure where the connection is, but there is  
one between teh touchpad and the trackpoint, if they are indeed in  
series... and that is obvious when you remove the palmrest.
>
> So, I think you can rule out a physically missing connection.  
> (Although removing the keyboard to check won't take too long).
>
>
> As far as UDEV sees it, there are 2 different devices, one for the  
> tpad, and one for the tpoint. These are normally, but not always  
> combined into
> /dev/input/mice.
>
> What happens when you do, for each possible $X
>
>   cat /dev/input/$X
>
> while wiggling the various devices and pressing buttons?
>
> Do you get any data stream?
>
> How many devices do you see?
>
> If I recall correctly, the tpoint = /dev/input/mouseX
> and the tpad = /dev/input/mouseY AND /dev/input/eventZ
>
> I assume you are using a 2.6 kernel and udev? (practically any  
> modern distro does this).
>
> Lastly, I think that the tpad can be disabled as a BIOS config  
> option - you might want to double check.
>
> Hope that helps,
>
> Richard
>
>
>
>
>
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