Possibly answering my own question - Google appeared to know:
If you start your Gnome control center and go to "Peripherals"; select "Mouse" and you can change the handedness of your mouse and it's speed.
Douglas Royds wrote:
Last night I succeeded in installing the Synaptics driver for my touchpad, and getting the tap-to-click working, but the mouse movement is agonizingly slow.
Under the GDM login screen, the mouse movement is fine. It is only once I have logged in that the mouse speed is dramatically reduced. I have worked around this by putting stupidly large numbers into XF86Config-4 as follows:
Section "InputDevice" Driver "synaptics" Option "Device" "/dev/psaux" <snip> Option "MinSpeed" "0.20" Option "MaxSpeed" "1.00" Option "AccelFactor" "0.001" EndSection
Now the mouse is almost unusably fast in the login screen, but is OKish once I'm logged in. There appears to be some user configuration setting under Gnome that I've missed, that is slowing the mouse down once I've logged in.
Any suggestions?
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