Touchpad and i8042

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Hi all,

I've noticed a weird behaviour when monitoring roughly the number of 
interrupts fired. The number of interrupts for "i8042" increase dramatically 
when I move the pointer using the touchpad.

I've only used "watch cat /proc/interrupts".

dramatically = ~800 interrupts
for only moving the finger from the top to the bottom of the touchpad.

I'm using kernel 2.6.21.1, don't know if this happened before - I noticed it 
now.

The interrupts only appear on touchpad usage, not on standby.

I think it is a synaptics touchpad, but I'm not really sure (how could I find 
out?)

Does anyone have an explanation for this? I've seen the "appletouch" problem 
problem on the linuxpowertop.org site but I don't know if they're related.


If any other info is needed, let me know.

Mircea
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