Touchpad testing.

[Ray.Tseng at quantatw.com]

Jim,
	Two possiblities:
	1)EC: as you mention EC slow down the rate
	2)BIOS: interrupt (serial IRQ) is not programmed correctly (Continuous or Quiet, level or edge,...) and the OS does not handle properly
	
	We are shooting 2nd.

Ray Tseng 9/21/06 

-----Original Message-----
From: devel-bounces at laptop.org [mailto:devel-bounces at laptop.org] On Behalf Of Jim Gettys
Sent: Thursday, September 21, 2006 3:48 AM
To: Ray Tseng (曾文瑞); Zephaniah E. Hull
Cc: OLPC Developer's List
Subject: Touchpad testing.

As suggested last night, we (Andres and I) took the older, 5V touch pad sample (the samples from early August; not the new 3.3 V touch pad we received in September) and plugged it into a standard PS/2 port on a conventional desktop.

It behaves exactly as you might expect for normal operation: bursts of information are at regular 10ms intervals  on the oscilloscope (the default rate for PS/2 is supposed to be 100hz).

Zephaniah reported that that older touch pad version on an unmodified (e.g. 5V) OLPC ATest board was also running very slowly, along with a standard PS/2 mouse.

So unless Zephaniah managed to break the Linux kernel driver in some unique way, the theory that the EC is somehow slowing the rate down tremendously seems very likely.

Zephaniah, does your kernel driver work well with a standard mouse on a conventional system.
                                    Best regards,
                                         - Jim Gettys
--
Jim Gettys
One Laptop Per Child


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