I don't know if it makes any difference but my exact model is:
Acer Aspire One AOD255-N55DQkk
I'm trying to configure X without the help of HAL and message bus. In other words, I'm configuring X in the good old fashion way by using xorg.conf.
With hal and messagebus turned off, X just freezes - keyboard, touchpad - everything. The screen looks ok in fact, but to write an xorg.conf file to fix the problem I will need the H+V values.
Looking at other distros installed on Acer Aspire One D255 netbooks WITH hald doesn't help - they don't use xorg.conf.
If you know where Windows7 stores this data, then I could try and look there.
Needless to say I've looked on the Acer site - useless.