Leopard and Fans

I had the exact same problem, fans running very fast during normal operation, but after restarting the MacBook Pro it just went away - for whatever reason.

Udo

PS I don't use SMC, at least not on my MBP.

Did you close smc fan control before upgrading? I wonder if it is not compatible with Leo?

This might be worth watching too as most MPB owners run this utility.

Just like in Tiger when it first came out, the computer is going thru a lot of processes for the first couple of hours or so. This may explain the fan behaviour or slowness that is reported in other threads.

The fan activity is most likely from the increased CPU needed to index the drive for the 1st time. This should subside after the initial index is constructed.

Good call there, Christopher - that is EXACTLY what just occurred with my installation!

Maybe that could be a reason, but in my case fans stayed at higher speed long time AFTER spotlight indexing was finished. And they rev'd up even more with every program that was started.

Cheers

Udo

My fans were running super fast last night after the install. This morning I had to reset the pram to get my machine to turn on and the fans are still running faster/louder. I had to call applecare as I wasn't sure if it was Leopard or something else. I have the 1/8 PPC iMac and he said my machine can handle it but it would run harder now as Leopard takes more cpu usage than Tiger did.

With Tiger the fans on my Dual G5 tower were barely audible.

With Leopard they kick in frequently, seemingly at random, when I am not doing anything more CPU intensive than typing an email.

After 2 years of relative silence I'm finding this quite distracting. Hopefully it will be fixed before long. In the meantime I may go back to Tiger....

Peter Moyer wrote:
This might be worth watching too as most MPB owners run this utility.

Most is a lot. Many would probably be more accurate. 🙂

gajones wrote:
With Tiger the fans on my Dual G5 tower were barely audible.

With Leopard they kick in frequently, seemingly at random, when I am not doing anything more CPU intensive than typing an email.

After 2 years of relative silence I'm finding this quite distracting. Hopefully it will be fixed before long. In the meantime I may go back to Tiger....

Exact same thing here. I am looking at my Activity Monitor right now and I am running maybe 10$ CPU usage but my fans are howling.

All of my fans (CPU/Exhaust/HD) show approx. 500 RPM in iStat.

My Mac was quiet and duly fell asleep under Tiger.
Under Leopard the fans are whirring most of the time and the Mac is not able to fall asleep.
When whirring, there is no indexing, Time Machine is off, the Unix "top" command does not show
any serious activity, the CPU usage monitor ditto, and there are no messages in the console log.

I could live with this constant annoyance if I knew that someone was looking into the matter.
Otherwise Tiger is looking good.

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Just one more thing: I can put the Mac to sleep and it sometimes wakes-up absolutely unexpectedly.
At least this waking left a signature: EyeTV. ElGato says that this happens when the new stick
is connected to the Mac via a USB port (my case), and that they are working on it.

Mike

Same here. MacBook with Leopard, well beyond the spotlight indexing phase, the fans come on strong about once an hour for no discernible reason.