Judging from the message "Failed to enable absolute mode", after
resyncing, the Alps driver has given up initializing the (now confused)
hardware, and the hardware is being handed over to the Plain PS/2
driver. Which means, the hardware handles the merging of stick/pad
events on its own, and it is seen as a plain PS/2 mouse. I.e. what
you're seing is the compatiblity mode.

Your problem should be fixable by applying the kernel patch I posted
earlier. I would be very interested to hear. Do you know how to compile
your own kernel?

[The patch as posted is active for the Alps device built into the E6500
laptop. If your M4000's device reports differently, we may need to
change the patch a little to activate the new codepath for it, too.]

-- 
ALPS DualPoint Touchpad flaky performance
https://bugs.launchpad.net/bugs/296610
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