Unexpected Shutdown (SMU -110, -122)

Question

Unexpected Shutdown (SMU -110, -122)

Hi all,

I just received my machine back from the Apple Store after having the logic board and CPU replaced. It appears as though the CPU was faulty (to quote the repair tech). You can follow that here:

http://discussions.apple.com/message.jspa?messageID=2773481#2773481

As soon as I brought it home and plugged it in, I've been having unexpected shutdowns. By this I mean that I will be using the computer "normally" (email, web) and it's as though the plug has been pulled. No messages, no warnings, nada. Poof! Fans are at normal speed; the computer seems completely "normal" in all aspects.

From the log below you can see the frequency is increasing. I actually had one occur while posting this, so I started a text file so as not to lose my changes. Then I had one occur while writing this file. I'm literally saving after each sentence!

Jul 25 09:15:48 localhost kernel[0]: AppleSMU -- shutdown cause = 2
Jul 25 19:23:39 localhost kernel[0]: AppleSMU -- shutdown cause = -110
Jul 25 19:30:45 localhost kernel[0]: AppleSMU -- shutdown cause = -122
Jul 25 19:32:42 localhost kernel[0]: AppleSMU -- shutdown cause = 2
Jul 26 09:17:09 localhost kernel[0]: AppleSMU -- shutdown cause = 2
Jul 26 10:11:35 localhost kernel[0]: AppleSMU -- shutdown cause = 2
Jul 26 10:17:44 localhost kernel[0]: AppleSMU -- shutdown cause = 2
Jul 26 10:26:00 localhost kernel[0]: AppleSMU -- shutdown cause = 2
Jul 26 10:36:26 localhost kernel[0]: AppleSMU -- shutdown cause = 2
Jul 27 09:12:20 localhost kernel[0]: AppleSMU -- shutdown cause = -122
Jul 27 09:30:26 localhost kernel[0]: AppleSMU -- shutdown cause = -110
Jul 27 09:40:24 localhost kernel[0]: AppleSMU -- shutdown cause = -110
Jul 27 09:58:41 localhost kernel[0]: AppleSMU -- shutdown cause = -122

Here's what I've tried, and I've received an unexpected shutdown after each of these steps.

- Ran Extended AHT; everything passes. (not that this 'does' anything 🙂
- Removing the USB cable leading to the APC UPS.
- Using wall power instead of UPS power.
- Reset the SMU.

I've now gone from one infamous issue (LED#7) to another infamous issue (SMU -122). To quote Homer, "Urge to kill... rising." Tongue-in-cheek of course, but quite frustrating.

Rob

PowerMac G5 DC 2.0, Mac OS X (10.4.7)

Posted on Jul 27, 2006 10:01 AM

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Answer 1

Jul 27, 2006 10:14 AM in response to Robert Slifka

Resetting the SMU didn't fix it as I was just hit with another shutdown.

Jul 27 10:08:42 localhost kernel[0]: AppleSMU -- shutdown cause = -110

Pulled the custom RAM (Corsair Value 2, 1GB sticks).

Rob

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Answer 2

Jul 27, 2006 10:16 AM in response to Robert Slifka

By the way, notice anything strange about today's shutdowns? They're almost exactly 10 and 20 minutes apart... Is that telling in any way?

Also I can't find anything on the web about SMU -110, only -122. Sure wish there was a reference on these error codes! 🙂

Rob

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Answer 3

Jul 27, 2006 2:09 PM in response to Robert Slifka

The more that I read these kind of posts I am thinking that not only should I get a proper UPS to support my machine; but I should get a voltage regulator.

I use to have a keyboard (Ensoniq EPS16) that would do all sorts of weird stuff before I connected it to a voltage regulator.

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Answer 4

Jul 27, 2006 2:28 PM in response to Robert Slifka

Update!

I showed him system.log output pruned to "SMU<space>" so that only the shutdown lines were showing. He taped it to the front of the machine and checked it in.

Dropped the machine off at the local Apple store. The estimate says "Power Supply 1K" and "Logic Board Dual".

I should receive a call today or tomorrow when they know more.

Rob

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Answer 5

Jul 27, 2006 2:29 PM in response to shaffer.david

The more that I read these kind of posts I am
thinking that not only should I get a proper UPS to
support my machine; but I should get a voltage
regulator.

BTW I was/am using a UPS with an incredible amount of headroom - APC 1200 VA.

I suspect this has to do with the replacement logic board that was recently installed.

Rob

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Answer 6

FAI

Level 2

206 points

Jul 27, 2006 3:01 PM in response to Robert Slifka

Rob, I had the same- but more random- unexpected shutdowns with error code -110. After having the power supply replaced, all is well again (so far!).

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Answer 7

Jul 27, 2006 3:21 PM in response to FAI

Rob, I had the same- but more random- unexpected
shutdowns with error code -110. After having the
power supply replaced, all is well again (so far!).

That's great news! The only other person on the forum with a -110 seemed to have success with that as well. When I hear from them, I'll be sure to mention this.

In my experience, the Geniuses can be quite dismissive of Apple forum content. I understand that there may be some "out there" things posted, but let's not throw the baby out with the bathwater!

[fingers crossed]

Rob

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Answer 8

Jul 28, 2006 7:20 AM in response to Robert Slifka

I've been struggling with the same problem for several months, with very little help from Apple sources. I don't want to load down this forum with more of the same, but if anyone's interested in my experiences:

http://richsamuels.blogspot.com/2006/07/fruit-myths-or-apples-dont-keep.html

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Answer 9

Jul 28, 2006 9:25 AM in response to Robert Slifka

Here is another SMU -110 user who reported success after having Apple replace the power supply, so I'm optimistic!

http://discussions.apple.com/thread.jspa?messageID=2806589#2806589

My lingering concern is that they won't be able to reproduce the shutdown and will call me today saying, "Sorry we can't do anything".

I'll speak to them today and keep you all updated. If a new power supply fixes it, perhaps Apple should add this to the knowledge base.

Rob

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Answer 10

FAI

Level 2

206 points

Jul 28, 2006 12:16 PM in response to Robert Slifka

I struggled with this issue for awhile.
Actually- I only knew I had an issue was when I recently changed my routine of running the Quad full power 24/7 to having it sleep automatically. there was never any evidence of a power supply problem when running it full power 24/7.

At first I thought it was a problem with the built-in Tiger power management software and my APC back-UPS RS1500 VA. I thought I had it solved after having no problems for 3 or 4 days after installing and using the APC Powerchute software:

http://discussions.apple.com/message.jspa?messageID=2754045#2754045

Then the same problem came back.

I was fortunate to have purchased AppleCare for the Quad- a likely diagnosis was made over the phone and they sent a tech out to my house to replace the power supply. My rig was down for only an hour! This was good since I was in the middle of a big project.

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Answer 11

Jul 31, 2006 2:34 PM in response to Robert Slifka

Apple Store phoned Sunday morning (7/30) with news that the power supply had been replaced and that it was ready for pickup.

Ran it pretty hard yesterday for about 12 hours doing various CPU-intensive tasks and it worked without issue.

So far on the forums we have 3 out of 3 people whose -110 issues have been solved with a power supply replacement.

Best of luck to everyone with -122. For those of you with -110, the answer is clear: Have your PS replaced!

Rob

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Answer 12

Jul 31, 2006 2:36 PM in response to Robert Slifka

In summary:

-110 is a power supply replacement.

-122 is still difficult to diagnose.

Rob

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