Trouble with graphics display in OS X

Dan Shafer revdan at
Sat Jan 15 13:39:52 EST 2005

I don't know whether it's RR or OS X, but I can confirm the behavior. 
It doesn't change even if I set my display to thousands rather than 
millions of colors.


On Jan 15, 2005, at 6:51 AM, James Hurley wrote:

> Bear with me on this one. I need to know whether my problem with OS X 
> lies in my computer graphics card or with RR.
> If the problem is with my  computer, I can deal with it, but if the 
> problem lies with the implementation of RR in OS X, I have problem.
> Try this simple experiment in OS X. Run the following handler:
> on mouseUP
>   repeat 1000
>     add 1 to field 1 -- This is an empty field.
>   end repeat
> end mouseUP
> In OS 9, I get a blur of numbers displayed in the field--this is fine 
> and what I would expect.
> In OS X I get a discrete sequence of 4 numbers displayed. This is the 
> same kind of herky-jerky behavior I found with graphics display in OS 
> X (but not in OS 9.)
> (As before, the problem is resolved by adding a line in the repeat 
> loop: wait 0 millisec, or unlock screen. But it runs much more 
> slowly.)
> Jim
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