"Mickey Segal" <email@hidden> wrote:
>A user of our software with a dual processor computer (DP 2.5 GHz G5 with 3
>GB RAM) reports that clicking buttons in a rapid sequence on our huge
>applet results in problems with the screen redraw getting stuck. The user
>has Safari with the latest version of Java 1.4. I'm unable to reproduce the
>problem on a slow single processor computer (G4 400 MHz with 192 MB RAM).
>Do dual processor Macs get confused in such situations?
I have a "slow" dual G4 and 1 GB RAM, but I've never noticed it to have
more problems with redraws because of 2 CPUs. My friend has a 1+ GHz dual
G4 with 2+ GB RAM, and I've never seen redraw lockups there, either, at
least not that I could trace to dual CPUs.
If possible, see if the G5 user can disable one CPU and then try to cause
the problem. If the glitch happens with 1 CPU, then it's unlikely to be a
dual-CPU problem.
I have a System Preferences pane called "Hardware" that installed when I
upgraded to 10.3. It lets me switch between 1 and 2 CPUs. I once thought
it was a standard Apple component, at least for dual-CPU machines, but I've
mentioned this to someone else with a dual G4 and they had no idea what the
Hardware pane was. So ask your user if they see it (or something like it),
and use that if possible. If they don't have it, I don't know where they
can get it, because I did nothing special when I installed or updated 10.3.
If there's no Hardware pane, you can control CPUs at command line, by
changing an Open Firmware boot parameter, then rebooting:
<http://developer.apple.com/qa/qa2001/qa1141.html>
A plus for the Hardware pane: no reboot needed.
-- GG
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