Sorry Christof, I haven't seen your answer, and I can't find it in the archives. I would like to remind Jeremy that you posted your screenshots showing the process status here: http://lists.macosforge.org/pipermail/xquartz-dev/2008-December/001824.html They look exactly as I saw them on my wife's little macbook. When I first observed this effet, I did not have any existing assumptions, which could mislead me to think it was X11.bin causing it, while it wasn't. I was simply curious about the source of heat and noises resembling the Sea Harrier on take-off, and it was Apple's activity monitor that showed X11.bin running at 100%, with everything else essentially being idle. Now, if the same cannot be confirmed by sampling, my next theory would be that the kernel lies about the allocation of user/system time, but at any rate, it seems that the heat is somehow generated in connection with X11, whether within X11.bin process or not. All I can state about the behavior I observed is this: X11 running --> Activity Monitor shows X11.bin at 100% --> the machine works as a space heater. X11 killed --> the heat level goes down and the fan stops. X11 starts --> the heat goes up. X11 responds to continuous mouse or keyboard action (work in gimp) --> the heat goes down user activity in X11 ceases --> the heat goes up and Activity monitor shows 100% CPU time again. After a reboot, I cannot reproduce it. Maybe I have changed something else as well -- that's why asked whether you've got any tips on how to reproduce it. --Gene On Fri, Dec 26, 2008 at 4:30 PM, Christof Wolf <ch.wolf@hfph.mwn.de> wrote:

Hi Jeremy,

...

Is it X11.bin that is using the CPU? The sample provided in the previous email shows it waiting almost 99% of the time... is it another process that's using up the CPU? Or am I missing something here...

yes it is X11.bin.

please read my answer to Gene :-)

ciao christof

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