OFW trackpad test woes

rihoward1 at gmail.com rihoward1 at gmail.com
Sun Oct 5 15:02:26 EDT 2008

On Oct 5, 2008, at 11:54 AM, Mitch Bradley wrote:

> rihoward1 at gmail.com wrote:
>> Mitch,
>> Just been testing q2e19a and the self test mode is still buggy. I  
>> am testing with a G1G1 laptop with Alps trackpad.
>> Seen several different things happen.
>> I ran the complete self test a couple of times by cold booting  
>> with the left rocker  held down.
>> 1.) One time when it went into the mouse test phase as soon as I  
>> touched the right hand section of the touchpad it left the mouse  
>> test and went to the next test.
> That could be explained by a queued-up keyboard character causing  
> the test to exit early - like if you typed more than one character  
> when trying to exit the display test early.  I guess I should flush  
> the input queue when starting the mouse test.
>> 2.) When I ran test mouse from the ofw prompt the screen was left  
>> black until I hit enter a few times.
> That's sort of intentional, so you can see the last state of the  
> screen.  That has some diagnostic value, but maybe not enough to  
> justify the potential confusion.
>> 3.) Another problem is when you  run 'test mouse' from the ofw  
>> prompt the screen the following may occur:
>> "Pressure:    10
>> Touchpad protocol botched
> This one I haven't seen.  I tried to reproduce it on three  
> different machines to no avail.  The dual-mode touchpad protocol is  
> somewhat twitchy, especially as regards switching back and forth  
> between resistive and capacitive mode.  The Linux driver has gone  
> through any number of revisions in hopes of stabilizing the  
> behavior, with only partial success.
> In light of the fact that we're about to switch to new touchpads,  
> I'm inclined to let this one slide.  I'm not sure it's the best use  
> of my time to try and beat this particular dead horse.

I suggest that item 3. be release noted then.

By the way if an Alps trackpad goes bad will it be possible to swap  
in a Synaptics track pad or is that physically impossible

>> mouse selftest failed.  Return code = -1
>> ok
>> Touchpad test. Both buttons clears screen.  Type a key to exit."
>> I can repeat number 3 just by running finger around trackpad while  
>> varying pressure.
>> On Oct 5, 2008, at 2:48 AM, Mitch Bradley wrote:
>>> http://dev.laptop.org/~wmb/q2e19a.rom is a test build that  
>>> purports to fix http://dev.laptop.org/ticket/8451#comment:7 (This  
>>> Time For Sure !)
>>> If anybody is just itching to test a bleeding edge OFW, this is  
>>> your chance.  (Okay, so it's not really all that bleeding.  It's  
>>> not too different from Q2E18 which is going in the G1G1V2 build.)

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