Bug#558318: Missing trackball support

[Michal Suchanek <hramrach@centrum.cz>]

Package: xserver-xorg-input-evdev
Followup-For: Bug #558318

You can set the options dynamically with xinput and some desktop
environments have a configuration applet for that.

I never managed to set any evdev options with udev.

Doing so is undocumented as is setting options with xinput.

On the other hand, the evdev man page refers to xorg.conf which
documents xorg.conf.d, a (hopefully) platform independent way of
configuring these devices (eg even on systems without udev).

It realies on the platform to correctly provide the device IDs, though.

Thanks

Michal