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Imac 27 runs hot as ****, won't sleep, and cpu runs wild in w7

I have been having audio issues with the imac 27. plugging headphones or speakers causes cpu to run crazy, the mic in the triband trrs jack does not work, and the imac runs hot, and will not go into power saver mode.

When I came in I found my nephew who was listening to some music on the imac, and I felt the back top of the imac and it was hot as ****. I almost burned my hand. I realized then that he had plugged his headphones in.

Unplugging the headphones or speakers can solve some of these problems.

But, this is not an acceptable fix.

Please contact Apple and urge them to fix these sound card issues.

If anyone does not have these problems in w7 with the imac 27 even after the latest bootcamp and imac updates, let us know right here. I think this affects every one of the late 2009 imacs and maybe some earlier ones too running windows 7.

Here's the post I recently ran on the headphone jack issue.

Not only does the cpu run crazy but the imac 27 gets very, very hot. Since I unplugged the headphones, it runs much, much cooler.

Certainly, some Mac engineers should take care of this problem, it seems it is universal on all the imac 27's and from what I gather, the smaller screened cousins too.

Also, we certainly want a stereo mix option for audio in or out, or what is called "what you hear" or wave out. Imac is supposed to be much geared to multimedia apps.

Finally, the mic jack part of the trrs set up MUST be fixed! A lot of manufacturers are going to headset combo jacks as they call them, mic in and stereo out on the same tribanded plug. But, the old single jack for mic in and single jack for stereo out are two tiny parts of the hardware and super inexpensive for the manufacturer. Why in the **** to go to the "advanced" triplug if the **** thing doesn't work.

Mac has a great reputation. I hope they remedy these problems right away.

Anyone whose imac 27 or 24 whose headset plug is working correctly. Let us know! I don't think anyone's is, but I think that few people understand that their cpu is running so much faster with the plug in, plus few even understand the combo jack and the triband, or trrs audio jack! Out of 4 audio technicians I talked to, not one of them knew what a trrs jack was or that you even have a mic in jack as part of the headset jack!

When I told one senior that it worked on the Mac side, he didn't believe for a while, thought my sound might be recorded from the onboard mic, but I proved it to him by tapping iaudibly on my iphone mic headset and and it showing up in garage band clearly and listening to big difference in audio.

As for a usb audio adapter, I am in a neon light environment and find that those adapters are more sensitive to electrical interference. Besides I want to use the headset jack as it was meant to be used!

Thats it.

Again, if anyone using an imac 27 and windows 7 64 or 32 doesnt have these problems, let us know! We are all anxious for a fix!

Best to all!

imac 27, Windows 7

Posted on Jan 23, 2010 2:15 PM

Reply
45 replies

Mar 7, 2010 8:47 PM in response to ALFREDOLEMA

I have a feeling that Apple considers Windows 7 as a biggest threat to Snow Leopard OS and doesn't like you to run them in your Mac.

I personally think that the Windows 7 is as lean as the Mac OS and runs just as good and fast, perhaps better, too.

If all the drivers for the magic mouse, headphone jack, and the graphic card works just as good as they are on the Mac OS, you got the best Windows PC in the market.

We the owners need to push Apple to bring out the drivers soon otherwise we have the conflicts of interest going on.

Mar 9, 2010 3:43 PM in response to synergy2000

Exact same here: iMac 27" Core i7, * expensive machine, Bootcamp Win7. 4th core running at 90% when I plug something in the jack.

Unbelievable. Since early january this is going on and nobody cares at Apple?

I also agree. I'm an intermittent Mac user, but mostly culturally PC. I decided specifically to buy this thing because I could run Windows 7 64-bit on it.

If I can't use a * headset on it, I'd say I was robbed.

Message was edited by: vhen

Mar 9, 2010 4:01 PM in response to vhen

Jeeeezzzz.

Dudes, you're fixed!

If you just plug in your speakers and then just ease them back out about half a mil, just at the threashold of the natural click, then you're set!

The CPU usage drop back to normal, and the sound goes through the cable. I don't know what the hardware/software interaction is there (maybe to do with the trrs implementation?), but it works this way.

Hope you're all as relieved as I am.

(found this here, post #22: http://forums.macrumors.com/showthread.php?t=837583)

Cheers.

V.

Mar 9, 2010 4:21 PM in response to vhen

Hey by the way, any of you guys experiencing crazy network latency on the WiFi?

My 2Mbytes pers second connexion doesn't go past 10kbytes on Win7, sometimes OK for a while, most of the time *****.

I've had to plug in an external USB WiFi adaptor to get back to normal. Lots of key driver issues on that Bootcamp, hey? I *think* (because I didn't notice it before) that it's the Bootcamp 3.1 that created that problem. Not sure. And I can't be bothered to go back to 3.0 now that I have the **** thing working.

*Update: No, now I remember, had the same issue before, as it took me forever to download Bootcamp 3.1. So that latency issue was there before, but I thought it was related to the CPU hogging. I only realised that it was the headset later. Then I was left with the latency.

Message was edited by: vhen

Message was edited (twice) by: vhen

Mar 12, 2010 9:55 AM in response to EuropeanAmerican

You can add me to the list of having this problem. I boot up Win 7 and within a few minutes the fan is running very loudly. With nothing open the CPU is running at 16-17%. If I unplug my external speakers the CPU usage instantly drops to 0%. Plug them back in and instantly jumps up to 16% again.

Very annoying. The only good thing is that at least the problem is identified. Not to mention I have the display issues everyone is complaining about as well.

Mar 23, 2010 3:49 AM in response to EuropeanAmerican

I'm having the exact same problem. Thanks for the tip with the stereo jack, btw.

Running Windows 7 (home 64-bit), the iMac idled at 70/75°C. Easing back the jack, the temp went down to 55/60°C while gaming, and below 50°C when idle.

I'll have to check whether the power saving features kick in. I never imagined it could be related to the stereo jack!

FYI, I assumed this was SPDIF-related and tried to disable the SPDIF output on the sound card, but it didn't solve the problem.

Please Apple, this really needs fixing.

Mar 26, 2010 4:26 PM in response to Echtzeithölle

The summer is around the corner and the iMac i7 is not getting any cooler than it's necessary.
If any of the internal hardwares goes bad due to heat, there will be massive return authorization requests happening soon or later. Please come up with the newer updated drivers as soon as possible.

I'm already worrying about the longevity of the graphic card, the hard drive, motherboard and the LCD panel as well.

I love the iMac design and the design alone is going to make many PC folks to switch to Apple. But procrastinating software updates are not a wise choice for Apple to compete against Windows. There are many good softwares avaiable only for Apple and the cooler, trouble free Windows 7 OS performance will advance the Apple to the competitive edge.

Apr 12, 2010 12:19 PM in response to EuropeanAmerican

Its crazy guys, I have the same issue under Vista. My 4th core is going to 100% when I plug anything into the speakers jack. (digital cable also).

Another thing is the display adapter problem.. Crashing or color banding errors. I'm totally unhappy, so expensive machine and useless with windows. I give 1-2 months than I will pass my Imac away coz its just a nice big nettop atm :(:(:(:(

APPLE PLEASE FIX ALL THOSE DRIVER BUGS!

Imac 27 runs hot as ****, won't sleep, and cpu runs wild in w7

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