[Gpm] Synaptics touchpad

[Charlie Shub]

Funny you should ask....  We are in mid project here in looking at
some mouse issues, albeit with a versatech versapad rather than a
synaptics touchpad.  We have attempted to add some functionality to
the versapad (viz the ability to turn of the "tap implies button press"
misfeature) and have done that both with modifying GPM and with modifying
the kernel.

one of the things we've observed is that we can add in "unjumpy" fixes
to either gpm or the kernel. the most fruitful approach for us seemed
to be to scale moves of a distance smaller than a threshhold.

> From: Chris Collins <cmcollin@polymail.cpunix.calpoly.edu>
> To: hdavies@ameritech.net, gpm@prosa.it
> Date: Tue, 24 Oct 2000 10:24:14 PDT
> Subject: [Gpm] Synaptics touchpad
> 
> Hello,
> 
> 
> I have a Compaq Presario 1685 laptop with a
> synaptics touchpad.  I have been through a steep
> learning curve with regards to this piece of cr**,
> I mean piece of equipment.
> 
> What does the latest gpm synps2 do to work with the famous
> linux kernel synaptics 'jumpy mouse problem'.
> 
> Does the poorly-functioning compiled kernel driver
> for this mouse get overridden somehow with GPM?
> 
> I have written one user who claims that using GPM
> makes all perfect.   I have been trying to ping
> the linux kernel writers to look at this.  The kernel
> solution seems like a large task.  
> 
> I really don't get the details.  Something about 6-bit
> scancodes vs 4-bit, and error handling should be removed
> from the kernel and it currently resides compiled in.
> The pc_keyb.c patch for the linux kernel is a kludge.
> 
> 
> What does GPM do?  I havn't used it.  I have XDM running and
> typically go straight for X, I thought GPM was only for
> consoles, but now I have heard otherwise, and am investigating
> weather this is a solution to my poorly functioning synaptics
> touchpad.
> 
> 
> --Chris
> 
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         charlie shub   University of Colorado at Colorado Springs
cdash@cs.uccs.edu  -or-  cdash@mail.uccs.edu  -or-  cdash@ludell.uccs.edu
(719) 262-3492        (fax) 262-3369            http://cs.uccs.edu/~cdash