[Nix-dev] How to fix the "jumping" touch pad on EeePC

[Peter Simons]

I installed NixOS on my EeePC, using Linux kernel 2.6.38. The system works
great, but the touch pad had the habit of making the mouse pointer "jump"
every time I touched it. It's a little hard describe what I mean, but you'll
recognize the phenomenon when you see it. :-)

Anyway, there is an easy fix for the problem -- add the following line to
/etc/nixos/configuration.nix:

  boot.extraModprobeConfig = "options psmouse proto=exps";

Then run "nixos-rebuild switch" and reboot.