Mac Pro 2006 fan activity while in Sleep Mode under SL

[benborman]

I upgraded my Mac Pro 2006 (full specs in sig) to Snow Leopard last weekend, and since I have noticed that random times throughout the night, or whenever my computer has been in sleep mode, the fans will all kick on in full blast (including the video card, I think). It is similar to when the computer is first turned on, or woke from sleep, except it doesn't turn on...just makes noise for about 5-10 seconds.

I haven't been able to really inspect the computer when it does this, as it is completely random, and usually wakes me up. I just look over, and its making loud noises...then stops.

My first thought is that this might be a Wake On Demand bug, but I don't have an Airport Base Station, just some D-Link router...but there are other Macs in the house.

Any ideas?

[irishgrizzly]

When you go check the machine again is it back sleep or "awake"?

[benborman]

The computer remains asleep. Happened again this morning.

[Tower-Union]

Poltergeist

[dissolve]

Poltergeist

Too bad Apple doesn't cover that under warranty.

[tobytoby]

I have this problem too. I've noticed it a load of times now, and the behaviour is exactly as described by the OP. Is anyone else experiencing this odd behaviour?

[J the Ninja]

pmset -g log


Anything weird in there from when it happens?

[benborman]

I simply did a clean install of Snow Leopard and it corrected the issue - sorry I didn't post back sooner, there wasn't much interest in this thread/issue.

[fredsherbet]

I'm experiencing this issue to. I ran the pmset -g log command and see the following entries at the time the mac pro's fans came on.

* Domain: applicationresponse.slowresponse
- Message: PMConnection AirPort configd plug-in com.apple.powermanagement.applicationresponse.slowresponse 7062 ms
- Time: 04/02/2010 06:37:45 GMT
- Signature: AirPort configd plug-in
- UUID: DCE1493C-A865-4718-8871-2EF90222636E
- Result: Noop
- Response time (ms): 7062

* Domain: applicationresponse.slowresponse
- Message: PMConnection IPConfiguration com.apple.powermanagement.applicationresponse.slowresponse 7062 ms
- Time: 04/02/2010 06:37:45 GMT
- Signature: IPConfiguration
- UUID: DCE1493C-A865-4718-8871-2EF90222636E
- Result: Noop
- Response time (ms): 7062

* Domain: applicationresponse.slowresponse
- Message: PMConnection mDNSResponder com.apple.powermanagement.applicationresponse.slowresponse 8171 ms
- Time: 04/02/2010 06:37:55 GMT
- Signature: mDNSResponder
- UUID: 123D9DE4-CE7F-4F90-8C09-817A076D41F1
- Result: Noop
- Response time (ms): 8171


Also, on the console I see the following two lines.

04/02/2010 06:37:45 Facebook Notifications[351] Net status changed to 0
04/02/2010 06:37:47 Facebook Notifications[351] Net status changed to 1


Can anyone interpret what's happening?

Cheers, Fred