Keyboard Prob In Logic - Screen Probs Too...., HARDWARE AND GRAPHIC PROBS IN LOGIC Options

[PAUL R]

Hi,
Running latest LOGIC and latest OSX...
This is a samll problem but it is driving me nuts !!

After a while recording/mixing etc the computer keyboard ( not controller keyboard ) gradually stops working.
Usually the track re size keys ( control + arrows ) stop working first.
Then numerical keys stop working - so I am often stuck on say a mixer page unable to go back to the arrange page.
At this point I have to save and close Logic then it will work as normal again....
Another symptom is that the track strips wont show properly i.e some details are missing , fader strip etc - also the floating toolbox shows as BLANK squares with no tools in them...other similar graphic probs too..
Same thing I save and re start and usually all works well for a while.
I got a new iMac and swapped keyboard it seemed to solve problem at first then - out of the blue the keyboard stopped working slowly one key at a time !!
I tried different usb ins for keyboard and recently bought a Kensington 7-way powered usb port - everything else works fine but track graphics and keyboard problems STILL happen quite randomly !!

Anyone - any ideas .... it is annoying really - it's not stopping me from working - just ANNOYING.

Cheers Paul