[gpm] flaky movement and buttons when using both stick and touchpad (ultranav)

Erik Bågfors erik@bagfors.nu
Mon Nov 24 13:12:05 CET 2003


I have the same computer but don't get the same problems as you are
having.  I tried gpm from cvs and the only problem I'm getting is that
when I use the stick (and it's buttons) sometimes gpm thinks I've
released the button even when I haven't.  If I just keeps pressing it,
it thinks I've pressed it again.

The other problems I don't have.  I run gpm as a repeater as well (but
don't use the -3 and -p arguments since I don't know them)

The options I have currently are
1) Disable the touchpad in the bios. This gives you all three mouse
buttons on the stick
2) Live with 2 buttons only and have both the stick and touchpad work
but without the cool synaptics behavior (scroll and so on)
3) Live with the brokenness described above, this means I can't use the
stick at all basically.

I'd love to get this to work.  Anything I can do to help the developers
find this???


On Fri, 2003-11-21 at 12:48, Tavin Cole wrote:
> hi all
> i have an IBM Thinkpad R40 with an UltraNav (trackpoint stick w/ 3
> buttons and touchpad w/ 2 buttons)
> i wanted to be able to use both in X so i run gpm as a repeater like so:
> /usr/sbin/gpm -m /dev/misc/psaux -t synps2 -Rps2 -3 -p
> everything works great, except for the following flaky behaviors:
> 1. sooner or later, when tapping the touchpad, the pointer will move off
> in a random direction for a (seemingly) random distance
> 2. following this, the touchpad buttons do not work, but pressing them
> causes the pointer to move again in the same direction for some
> distance.  the stick buttons work but also cause this pointer motion.
> 3. also, when using the stick there is a bias for the pointer to move in
> the same direction as the random movement described above.  iow, the
> pointer will go in that direction when pressing lightly on the stick in
> the opposite direction.
> 4. sometimes while moving the pointer with the touchpad and holding down
> a stick button, the system thinks i have released the stick button but
> i'm still holding it down.
> 5. the touchpad buttons work again after moving the pointer with the
> touchpad.  sometimes it takes a few tries though.  then the random
> movements stop occurring, until you use the stick or a stick button or
> again tap the touchpad just right.
> 6. restarting gpm is the only way to get completely back to normal.
> as you can probably imagine, these behaviors become quite irksome after
> a while ;) .. especially if other people try to use my laptop who aren't
> used to it.  i have lived with it for a few months and now i would
> dearly like to see it fixed.  i'm willing to hack on this with some help
> as i am not an experienced C programmer.
> i've attached my gpm-syn.conf.
> thanks for gpm!  even in my case it's still better than living without a
> middle mouse button!

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