[Sderby] Cannot open device /dev/psaux

[Ray Curd]

Hello everyone

After accidently switching off my internet gateway/firewall without a 
proper shutdown, now whenever I start X and KDE I have no mouse, I 
get the following error message:-

xf86OpenSerial: Cannot open device /dev/psaux, no such device or 
address.

/dev/psaux still exists so can anyone give me advice on what I've 
managed to corrupt or where to start looking.

Thanks in advance

Ray Curd.