So you have rotated display ('xrandr --orientation') and now touchpad ('synaptics') can't be used.
The problem is that the touchpad maintains its original orientation, making the netbook difficult to use.
Here is a driver to allow the touchpad to calibrate to the screen orientation direction.
And when you next time boot X, new driver will be in use.
Commandline syntax is: (This will change axis like screen is rotated to left.)
I think easiest way is to make scripts that orient the screen and change
axis in the same time. Then you can make shortcuts and what ever you want.
At least, with this list you can check synclient Orientation parameter meanings.
synclient Orientation=0 ; xrandr --orientation normal
synclient Orientation=1 ; xrandr --orientation left