See my post in comment 126...

I thought I was getting closer but it seems like a dead end.  The ALPS
touchpad on my Dell I15R N5110 has an E7 signature of 73 03 50.  When I
do a vbox capture it spits out pure PS/2 mouse commands and responses,
nothing specific to the ALPS driver.   I'm getting the exact behavior as
this thread:

https://patchwork.kernel.org/patch/1162831/

I'm running Windows Vista with the Alps 7.2.101.224 driver, which
appears to be stable when I'm not doing a serio_raw capture.  It is
listed as a "Dell Touchpad" in the Device Manager

One thing I need to research more is from this:

dturvene@growler:539$ xinput --list
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ Logitech USB Mouse                        id=12   [slave  pointer  (2)]
⎜   ↳ AlpsPS/2 ALPS GlidePoint                  id=15   [slave  pointer  (2)]
⎜   ↳ PS/2 Mouse                                id=13   [slave  pointer  (2)]
 
The ALPS driver is being used (I can see it's output in system logs) but all 
control is on the PS/2 Mouse id.  For example: xinput "set-prop 13 132 0" 
disables the touchpad but "xinput set-prop 15 132 0" does nothing.

Is the ALPS driver defaulting to a pure PS/2 mode and some secret
command sequence gives it enhanced super powers?  I messed around with
the Vista control panel in serio="psmouse" mode and didn't see anything
significant.  The driver works fine, even with typing fast, which under
Ubuntu causes the pointer to jump to the cursor location.  In the Vista
driver, there is very limited control of the mouse though (e.g. cannot
disable tap-to-click) so maybe it's a very simple piece of hardware.
Not much where the driver is install at c:\program files\delltpad.

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https://bugs.launchpad.net/bugs/606238

Title:
  synaptic touchpad not recognized on dell latitude e6510 and others

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