Touchpad accel, spirals and xset
pgf at laptop.org
Mon Jan 18 14:47:02 EST 2010
> On 01/18/2010 12:34 PM, Paul Fox wrote:
> > > You are suggesting xset m 7/4 4? My tests where with 7/4 1...
> > oh! sorry -- i was mis-remembering. you're correct that i
> > previously recommended that the last element should be 1, and
> > that's still correct. (although in practice greater values
> > probably won't be much different).
> According to the man page the 2nd parameter is the threshold at which
> the acceleration value is applied so I'm not surprised that you don't
> see any difference between 0 and 1. Even 4 might be hard to see. I
> think that to see a difference for fine motor this value will have be in
> the 5 to 10 range.
martin isn't seeing a difference, which surprises me, because i
definitely saw a difference between 0 and 1. from the wiki page
i wrote at the time:
One would think that a threshold of '0' might cause behavior
very similar to '1', but unfortunately that is not the case --
'0' seems to be special. Changing the xset line to "xset 7/4 1"
results in much more predictable motion.
in more recent X servers, '0' is definitely special -- it invokes a
completely different (and more sophisticated) acceleration algorithm.
in the server we used on 802, it seemed to be different, but not
necessarily in a good way.
(i don't have an XO-1 nearby to test with right now.)
paul fox, pgf at laptop.org
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