"Two finger scroll" default -> breaks scrolling with no option to change

Hello,

as described in LP: #1217166 "two finger scroll" is now the default behaviour in ubuntu. I agree with the points made there (even though an auto-detection of the "two finger scroll" would be great), but the problem is the following paragraph:

"For someone with a laptop old enough that it lacks a two-finger capable touchpad, opening a settings dialog in order to turn off two-finger scrolling (aka turn *on* edge scrolling) is probably the least of their worries. When someone is knowingly trying to run the latest and greatest OS on hardware than is more than five or six years old, their expectations are different, are more forgiving."

If the touchpad doesn't support two-finger-scroll, one canNOT change the two-finger-scroll option. It's simply greyed out. The only way to change it is via dconf.

This is a very severe bug, as it breaks the ubuntu user experience for almost all users who don't run an expensive and new laptop. (and the laptop doesn't need to be five or six years old, a cheap new one is enough.. )

This affects the current 13.10 beta version of Ubuntu (upgrade from 13.04).

Regards