MacBook Air Fan Noise With Lion

Also I found some other cause. In my Air (2011 model), if I open the lid as soon as I connect the AC adapter, the CPU temperature starts rising, and, sometime later, the fan speeds up and continues at minimum 4000 rpm.

If I open the lid after approx 30 seconds after connecting the power adapter, the fan keeps running at approx 2000rpm, except when I really use the processor (such as when compling code, encoding some videos or viewing some Flash websites).

In the logs, I saw that when I open the lid immediately after connecting the AC adepter, I only get one wakeup event:

kernel: Wake reason: EC.ACAttach (User)

However, if I open the lid sometime after connecting the AC adapter, there are two events:

kernel: Wake reason: EC.ACAttach (Maintenance)

kernel: Wake reason: EC.LidOpen (User)

It seems that something in Lion WRT to suspend/resume is not right. Maybe when I open the lid while it is still done some work from the ACAttach event leaves the CPU or GPU (since they share the same package) in some inconsistent state regarding power management.

I can concur with this. Also If I wait 30 seconds or so after waking the computer then connectin the charger cable - I do not get the fan running at full speed or staying at a higher than normal speed. I've been doing this for two days now and the fan runs a lot slower and is a lot quiter.

All,

I've been suffering from Lion running hot since day 1 (and not coming from spotlight). I applied all the recipes available with no improvement... until I disconnected my magsafe cord.

Fan almost immediately stops and I have been working for a few hours without having the fan bothering me... back to the silence of snow leopard!

I just have to reconnect when I'm running out of battery.

Let me know if you observe the same thing... and that's a msg to Apple engineers, fix that ASAP!

thanks

I FINALLY fixed the fan issue in my MBA this week. It seems like my Citrix VPN client was causing issues with Lion. A friend gave me the fix documented below in the event you have Citrix installed on your MBA. Since then I have had NO fan noise for the 1st time since upgrading to Lion.

Try this in your terminal window…

· sudo launchctl unload -w /Library/LaunchDaemons/com.citrix.agadminservice.plist

copy and paste the above into the terminal window , enter your system password.

I have tried everything mentioned in this thread to stop my MBA fan noise, all to no avail. Hoping that Apple finds a permanent fix for it in their next update of Lion.

I had exactly these issues with my new Macbook Air 13. Having read this forum I downloaded istat pro and discovered that my fan was always running at over 4000 rpm and the top left part of my case was quite warm. I then followed the instructions here...http://support.apple.com/kb/HT3964?viewlocale=en_US and after this the problem was fixed!

Thanks guys (I hope this might help others)

I've just updated a clean install of Lion to 10.7.2 and have had no change in the bug. My fan still cycles on and off constantly and my battery life of my 13' 1st generation unibody is less than 2 hours. Very frustrating, as I see no way of solving this until Apple releases a fix. The same machine runs perfect with a Snow Leopard drive - and gets 6-7 hours of battery life.

Seems much better on my 11" 2011 MBA with Lion 10.7.2.

I have to test it better, but with smcFanControl set up at 2700 rpm seems to work good!

Okay so I've got the mid 2010 Macbook Air 13" with Core 2 Duo processors 4 GB RAM and 256 GB solid state "hard drives" (flash storage). This post was keeping me from upgrading to Lion. However, I got an iPhone 4s and wanted to take advantage of iCloud so I had to upgrade to Lion. I made a Carbon Copy Clone of my SnowLeopard on an external hard drive in case I needed to revert, but upgrading to latest Lion 10.7.2 WENT JUST FINE. There is no fan or heat problem. I run three different desktops as well as a Parallels desktop running Windows XP for a SQL database instance and it all works just as well (if not a little faster than before). Don't know if my results are typical or if the 10.7.2 version fixed something. But it's been great for me for what it's worth.

Thanks Robson, that trick I'll have to give a try. Came on the forums because I've had this issue for awhile now - and really am tired of it. Thanks for posting a resolution, I'll give that a try later.

-David

I am a happy owner of both 2010 and 2011 13" macbook air.

I did not encountered any of the issues explained here, but I just wanted to mention that its worth to check Activity Monitor, making sure that "All processes" rather than default "My processes" is selected. That way you may identify OS processes using up CPU, which nornaly would not be displayed.

Good luck!

Dan

OMG... mine does it too!!

i have the 13'' 1.7HZ, 4GB, and the fan gets really noisy and the charge/plug area gets hot 😟 I am quite disappointed since I thought this shouldn't be a problem 😟

have you tried any of the fixes, suggestions described?

I've got 12 Macbook airs for the office, and have no such problem with any of them, unless there is something running in the background peope often don't notice...

Hey chocksaway - this worked for me. I also have a 2011 13" i5 with "jet engine" fan.

Resetting the SMC has sorted the problem completely.

I had the same problem Mac late 2010, 2.13 Intel core duo 4GB RAM 2

Lion was installed as update.

as result:

CPU on 80 °C and to keep it between 70 and 80 °C fan had to work on 6500 RPM.
I used Istat.
repaired permissions, no result, reset the SMC and so on... no results.
lately reading also other posts, I started to disable 1 by 1 the start up items.
the antivirus Sophos + the time machine auto back up -on off was quite successful
now I have a 4000 RPM = quite decent as noise level and CPU at 40-47 °C.
had nothing to do with the flash or browsing.
Spotlight, yess is pushing the temp up, but is not running 24/7
Check your startup items, the answer can be there
Maybe helps
Good luck!
Lucian