Mac Pro makes fan noise when coming back from sleep

[SDAVE]

When I put the computer to sleep, then wake it up, the fans go crazy. I have to shut it down and start it up again so it would go back to normal.

 

[dusanv]

There are some firmware updates for the MP and the x1900XT on Apple's site. Try that. Is it the video card fan or the machine itself?

 

[SDAVE]

I have all the updates for the video card as well.

It sounds like the video card or the rear fan? Really loud. Sleep mode is useless now.

 

[dusanv]

Use iStat Pro to see whether the 4 case fans are spinning at normal speed after you wake it up (should be at less than 1000 rpm, mine are at about 500-600 rpm).

When did this start for you? With 10.5? Mine does the same but stops after a couple of seconds.

 

[bld44]

Could you perhaps be a bit more specific than "crazy?"

It is normal for the fans to rev up when returning from sleep.

 

[Glen Quagmire]

Mine started doing this as of two firmware updates ago - before that, waking from sleep was pretty quiet.

It's annoying, but you can't you anything about it.

 

[SDAVE]

Sorry. By crazy I mean the fans stay at a high RPM and they dont slow down. I have to restart it to get it back to normal.