Well, after a day of testing I think something is still wrong, only less
so.  I still get occasional spurious focus changes.   It only happens
when I'm typing really fast.  And then the focus changes to where I
rested the cursor.  Still, it happens a lot less frequently.

@quarara:  Yeah, it's a little detailed.   Basically, I built a Dynamic Kernel 
Module for the psmouse driver, taking the source from 
http://people.canonical.com/~sforshee/alps-touchpad/psmouse-alps-0.10/psmouse-alps-dkms_0.10_all.deb
It's the same patch sergiomb discusses.  The step-by-step instructions are 
(taken from an askubuntu post), 
MUST USE sudo:

* dpkg -i psmouse-alps-dkms_0.10_all.deb
* cd /usr/src/psmouse-alps-0.10/src
* edit alps.c, copy the line with the Vostros 1400 comment to the end of the 
array and change 0x73, 0x02 to 0x73, 0x03.  This creates a new description for 
the I15R.  BTW, DEBUG is defined so the driver will log to dmesg 
(/var/log/kern.log on my system)
*  dkms add -m psmouse -v alps-0.10, which builds the module.  This is where I 
got the compile error and removed alps.c#136.
* dkms install -m psmouse -v alps-0.10, which installs the new driver
* rmmod psmouse && modprobe psmouse, which removes the old driver and loads the 
new one
* dmesg for lines beginning with alps.c
* xinput --list to see "PS/2 ALPS GlidePoint"
* syndaemon -i 2.0 -K -R -t to change keystroke to touchpad delay.  
ALternatively use can use the Settings->Mouse and Touchpad->Touchpad screen, 
enabled by the ALPS driver, to mess around with this.
* xev to test touchpad and buttons

Complicated, and you need to be somewhat familiar with kernel drivers,
but HTH.

Dave

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https://bugs.launchpad.net/bugs/678103

Title:
  Dell Inspiron N Series, Touchpad recognised as generic PS/2 mouse

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