Comment 4 for bug 466532

( Did you say sorry? Why!? You are helping! You don't need to say sorry ;-) )
DONE. But something strange happened when downloading the sources look:

/home/daniel
> apt-get source easystroke
(.....)
gpgv: Firmado el jue 20 ago 2009 18:50:04 CEST usando clave DSA ID 491E5389
gpgv: Imposible comprobar la firma: Clave pública no encontrada
dpkg-source: aviso: fallo al verificar la firma en ./easystroke_0.4.9-0ubuntu1.dsc
dpkg-source: información: extrayendo easystroke en easystroke-0.4.9
dpkg-source: información: easystroke_0.4.9.orig.tar.gz desempaquetado
dpkg-source: información: aplicando easystroke_0.4.9-0ubuntu1.diff.gz

This means that the sources packet, is signed by ID 491E5389, and this ID is from Julien Lavergne, that's actually working in the AWN applications, whis is a coincidence? an error? Did Julien, packed the sources for ubuntu? I'm confused.

As for your instructions:

Leyendo símbolos desde /home/daniel/easystroke-0.4.9/easystroke...done.
(gdb) run
Starting program: /home/daniel/easystroke-0.4.9/easystroke
[Thread debugging using libthread_db enabled]

Program received signal SIGFPE, Arithmetic exception.
0x000000000046e09e in Grabber::XiDevice::normalize_pressure (
    this=0x7fffffffe6d0, ev=...) at grabber.h:94
94 return 255 * (pressure - pressure_min) / (pressure_max - pressure_min);
(gdb) bt
#0 0x000000000046e09e in Grabber::XiDevice::normalize_pressure (
    this=0x7fffffffe6d0, ev=...) at grabber.h:94
#1 Main::handle_event (this=0x7fffffffe6d0, ev=...) at main.cc:1810
Cannot access memory in adress 0x7fffffffce98

By the way, the process appears in T state in ps -ax
PID TTY STAT TIME COMMAND
4315 pts/0 T 0:00 /home/daniel/easystroke-0.4.9/easystroke

Treat me as an Idiot, but are there some way to put the stuff I wrote in "spoilers tags"? I ask it for doing a much clear post.
Thanks for all, and await more instructions (if any).