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New 4850 3.06ghz iMac freezing multiple times a day.

ipsum said:
Flash takes a lot of ressources.

Try this: download Istat Pro. Launch a song on Itunes and the 3d animation thing (don't know the name in English). Make the window of itunes the biggest possible, and look at the widget at the same time. You should notice a rising of the GPU temp. That's what happen with mine.
Click to expand...


yeah its rising fast

ATI Radeon HD 4850:

Chipsatz-Modell: ATI Radeon HD 4850
Typ: Monitor
Bus: PCIe
PCIe-Lane-Breite: x16
VRAM (gesamt): 512 MB
Hersteller: ATI (0x1002)
Geräte-ID: 0x944a
Versions-ID: 0x0000
ROM-Version: 113-B9090C-181
EFI-Treiberversion: 01.00.327
 
Am I safe?

Two lock-ups on the first day, calling Apple for a replacement first-thing Monday morning (going to try really hard to have them send the machine out with overnight shipping (no charge of course), and before they receive this one back).

2.93 iMac, 640gb HDD

4850 Profile:
Vendor: ATI (0x1002)
Device ID: 0x944a
Revision ID: 0x0000
ROM Revision: 113-B9090C-181
EFI Driver Version: 01.00.327

"ATY,MemVendorID" = <0600>
"ATY,MemRevisionID" = <0200>

Ordered March 7th, arrived April 18th.

Will update the post when my second machine arrives to report if that one has lock-ups as well.
 
Mines crashed AGAIN.

about the 8th time now! I dont even use it a lot!

this crash is a bit different, the mouse has frozen.

most open apps can be switched to apart from itunes and syncropation

its a bluetooth mouse so i've switched it off / on but still no joy


GREAT another reboot!

if nothing is done about this by apple next week, the imac is going back! Refund time!! :mad:
 
Macole said:
Shouldn't Apple say something about the situation ?

We do they leave this uncomment ?
Click to expand...

You have to understand that if they do, it could bring trouble to their end as far as an increased number of calls/demands for returns/etc

I wonder if a call to the BBB would do anything, but that sounds a bit extreme.
 
Nothing is too extreme (well, maybe putting a flaming bag of dog poo on the front door of Jobs house would be). I've seen headline news at Engadget and Gizmodo over lesser problems with small numbers of Macbook Pros having issues such as case blemishes.

And here we are with a very expensive top spec iMac that is completely unstable and not a word out of any one of the Apple
"news" sites. Apparently they don't want to bring attention to this because it would hurt Apples feelings.

The fact that this is happening in OS X and in boot camp is very troubling as it makes it more likely that we are dealing with a firmware/hardware or thermal problem that will not get an easy fix (such as a driver update).

Everyone affected needs to complain to Apple, email gadget sites, email Apple news and rumor sites and put the spot light on this until Apple does something about it.

The fact that Apple has the gall to tell people they will still have to pay 15% restocking fees on these defective Macs is absolutely unacceptable.
 
jaw1034 said:
I've been talking to Apple off and on all morning and there is a fix for the freeze. They're e-mailing me Fed Ex labels and I'm exchanging my iMac for a new one. If the new one freezes, I'll exchange it too. Repeat until I get one that doesn't. Thanks, Apple.
Click to expand...

This is wonderful news! Could you elaborate any further for us?
 
Animalk said:
This is news! Do you have any details about the fix? I am sure many people would like to know! Is it a hardware thing? Firmware/Driver? Manufacturing?
Click to expand...

They assume it's hardware even though both Apple hardware tests come back okay. They have more sophisticated testing at Apple that they can run. The "fix" they offered me was to take it in for service or replace it. Because I like my products to work correctly straight out of the box, I told them I'd rather replace it. They were really nice and understanding about it, and because I had tried all their DIY fixes they were glad to switch it.

So for those of you with the same problem, this is what I had to do before being offered the repair/replace fix: (1) Shut down ,unplug, wait one minute, plug back in, reboot normally; (2) Shut down, restart while holding shift to boot in safe mode; wait a few minutes after complete boot up in safe mode; restart; (3) Shut down, restart while holding P+R+Cmd+Opt to reset parameters; (4) Run Disk Utility Verify/Repair Permissions and Verify/Repair Disk; (5) Reinstall Mac OSx using Archive and Install installation method; (6) Run Apple hardware test, both short and extended version.

After all that, the problem persisted and Apple was more than glad to make it right by offering to repair or replace my iMac. I opted for replacement. Good luck everyone.
 
jaw1034 said:
I've been talking to Apple off and on all morning and there is a fix for the freeze. They're e-mailing me Fed Ex labels and I'm exchanging my iMac for a new one. If the new one freezes, I'll exchange it too. Repeat until I get one that doesn't. Thanks, Apple.
Click to expand...

i hope we doesnt have to wait half a year like with the 2007 models :mad:
 
I just wanted to bring everyone's attention to this thread:

https://forums.macrumors.com/threads/688136/

If people could run this command from Terminal (especially those NON-freezers)

ioreg -l | grep ATY | grep Mem

And provide the output of MemVendorID, maybe it'll shed some light on the situation.

Last time with the Mid-2007 iMacs with the ATI HD2600 Pro, only the iMacs whose video memory MemVendorID = 0600 had freezing trouble. It seems unlikely apple didn't learn from that event and its the exact same problem all over again, but its something to try :)
 
djc6 said:
I just wanted to bring everyone's attention to this thread:

https://forums.macrumors.com/threads/688136/

If people could run this command from Terminal (especially those NON-freezers)

ioreg -l | grep ATY | grep Mem

And provide the output of MemVendorID, maybe it'll shed some light on the situation.

Last time with the Mid-2007 iMacs with the ATI HD2600 Pro, only the iMacs whose video memory MemVendorID = 0600 had freezing trouble. It seems unlikely apple didn't learn from that event and its the exact same problem all over again, but its something to try :)
Click to expand...

"ATY,MemVendorID" = <0600>



.... -__-'
 
ipsum said:
Well, I don't know about US consumers' laws, but in France, you can replace your order within 15 days free of charge. As the guy from Apple told me, UPS, TNT, Fedex or whatever will call you to know when they can come to get your Imac. You just tell them that you're busy for the next 15 days. At some point, you could have 2 Imacs at home. I think this is worth taking the risk because you won't be without computer. The more Imacs will return to Apple, the more they will care about the problem, cause this costs them a lot. That's why they created the refurb.

And 2 guys of Apple told me that this was likely a hardware issue. Could you give your serial numbers of the GPU?
Click to expand...

Yep, I just need to tell TNT that I am not ready for them to collect it. I have 5 days from delivery of the new one to have the old one picked up before they charge me for the new one.

My GPU info is:

ATI Radeon HD 4850:

Chipset Model: ATI Radeon HD 4850
Type: Display
Bus: PCIe
PCIe Lane Width: x16
VRAM (Total): 512 MB
Vendor: ATI (0x1002)
Device ID: 0x944a
Revision ID: 0x0000
ROM Revision: 113-B9090C-181
EFI Driver Version: 01.00.327
Displays:
iMac:
Resolution: 1920 x 1200
Depth: 32-Bit Color
Core Image: Hardware Accelerated
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Built-In: Yes
Display Connector:
Status: No Display Connected
 
jaw1034 said:
The "fix" they offered me was to take it in for service or replace it.
Click to expand...

So false alarm.... they don't really have a fix yet except to get lucky on how they build it.

Don't say that kind of stuff.
 
Tymbo said:
So false alarm.... they don't really have a fix yet except to get lucky on how they build it.

Don't say that kind of stuff.
Click to expand...

My original post was pretty clear: the way to fix the freeze is to service or replace the computer. I don't understand what the problem is. If you've just received your computer, then replacing it should not bother you. Even if it's a 50/50 shot to get one that doesn't freeze, you can always just keep sending them back until you get one that works. If you've waited this long just to receive a broken computer, why not persist and wait a bit longer to get one that isn't broken?
 
Tymbo said:
So false alarm.... they don't really have a fix yet except to get lucky on how they build it.

Don't say that kind of stuff.
Click to expand...

But, if they know about this, one would think that they would do a bit more testing on the iMacs that are being shipped this week or next week. Don't you think?

That makes me think that they will be more careful before sending more flawed machines out, and maybe just maybe the ones we get starting next week will be ok? <fingers crossed>
 
jaw1034 said:
My original post was pretty clear: the way to fix the freeze is to service or replace the computer. I don't understand what the problem is. If you've just received your computer, then replacing it should not bother you. Even if it's a 50/50 shot to get one that doesn't freeze, you can always just keep sending them back until you get one that works. If you've waited this long just to receive a broken computer, why not persist and wait a bit longer to get one that isn't broken?
Click to expand...

Because it's a big pain in the butt to have to keep sending them back. If this indeed is a major problem affecting many units, that points to a big quality control issue, and repeatedly sending it back and rolling the dice on another one doesn't attack the heart of the problem.
 
Omni Geno said:
Because it's a big pain in the butt to have to keep sending them back. If this indeed is a major problem affecting many units, that points to a big quality control issue, and repeatedly sending it back and rolling the dice on another one doesn't attack the heart of the problem.
Click to expand...

Exactly. That is my point. Apple would or should I say Should Not just swap out another one without testing it for at least 1 day. Surely they have some means of doing this on a mass scale or even on a scale for the ones about to ship out soon.
 
Apple really have to get a handle on this, as it costs both the buyer and Apple time and money to look at these iMacs that are failing and not the mention the frustration of the Buyer having to wait for the iMac in the first place a long time for some of us, then having to send it back and maybe get the same problem in the replacement machine.
 
AppleInsider now has a post regarding this particular issue: New iMac owners see Radeon HD 4850-related lock-up issue.
Thanks for those who sent it to them. Can we see a post as well here on MacRumors, maybe Engaget too?

It's unlikely the GPU is overheating causing the freezes. Since I always keep an eye on the temperature, every time my mac crashes, the GPU is always around 50 to almost 60 Celsius. It's quite normal.
 
GamaFu said:
AppleInsider now has a post regarding this particular issue: New iMac owners see Radeon HD 4850-related lock-up issue.
Thanks for those who sent it to them. Can we see a post as well here on MacRumors, maybe Engaget too?

It's unlikely the GPU is overheating causing the freezes. Since I always keep an eye on the temperature, every time my mac crashes, the GPU is always around 50 to almost 60 Celsius. It's quite normal.
Click to expand...

Thanks GamaFu, for posting a link to that article. It is helpful. I encourage everyone to take a glance at it and it may ease their panic attacks somewhat.
 
WizardHunt said:
Exactly. That is my point. Apple would or should I say Should Not just swap out another one without testing it for at least 1 day. Surely they have some means of doing this on a mass scale or even on a scale for the ones about to ship out soon.
Click to expand...

No way that would ever happen. Mass-scale is right. Do you have any idea how much it would cost Apple to test each computer ordered for "at least one day" before delivery? People were already complaining about ordering the ATI and having to wait 3-5 weeks for delivery. How much longer do you think it would have taken to test each one for "at least one day" before shipping?

And I know you'll say, "But I was just talking about testing the replacements for the malfunctioning iMacs." Either way, it's probably cheaper for Apple to replace or repair the iMacs of customers who complain, and, for those iMacs that are replaced, to refurbish and resell them at discounted prices later.

Gotta respect that bottom line.
 
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