Touchpad accel, spirals and xset

Paul Fox pgf at
Mon Jan 18 12:34:16 EST 2010

martin wrote:
 > On Mon, Jan 18, 2010 at 4:11 PM, Paul Fox <pgf at> wrote:
 > > in my testing, setting
 > > the final argument to 0 resulted in extremely jerky performance.
 > Was that with the new or old psmouse code?
 > Have you got a test procedure I can try, maybe drawing spirals isn't
 > the only relevant test...?
 > > if setting the last arg to 4 is too slow, i think using 1, 2, or 3, would be
 > > a better choice than 0.
 > 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).

forget what i said in my previous mail -- if you think the
acceleration is too slow with "xset m 7/4 1", then adjust it by
changing the first parameter:  "xset m 2 1", or "xset m 9/4 1",
or "xset m 5/2 1".  remember that that parameter is a fraction. 
(which is an odd choice -- i probably would have used a

be sure and also test with an activity that requires very fine
motor control.  some of the etoys games, where small pieces need
to be connected together, are a good example.

 paul fox, pgf at

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