Scott Mansell wrote: > While experimenting with getting my laptop's power usage down, I > discovered that moving the mouse caused a lot of i8042 interrupts > (with a finger resting on the pad, just under 430 interrupts per > second (per core? this is a core 2 duo)). With all these interrupts, > my power usage increased by like 1.1w, which is a lot considering I > can get it down to around 10.1w. > > Apart from not using the touchpad, is there anything I can do to > decrease the power usage. 480 interrupts seams a little high, > considering the touchpad is only meant to generate 40 or 80 packets of > data per second. > Code says the synaptic packetsize is 6 bytes, and the i8042 PS2 controller delivers each byte in a separate interrupt, so 480 interrupts would be consistent with 80 packets. I suspect there's nothing you can do. My desktop does 500 wakeups/s with continuous mouse movement; I don't think this is unusual.
Maybe serial mice are the way to go :-P. Tho what you gain from the FIFO buffering you might lose in powering the serial port, I dunno. Or USB, though that would stop you from going into C3. Alan _______________________________________________ Power mailing list [email protected] http://www.bughost.org/mailman/listinfo/power
