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Compare MemVendorID from Freezers and Non-Freezers! Lets narrow down the video cards.

Maybe it is a combination of ROM Revision/EFI Driver Version and MemVendorID?

I have the same MemVendorID as the person above (600) but my EFI driver version is 01.00.207, and mine just loves freezing - I'd go as far as to say it is totally obsessed with this freezing fad.

Just a thought.
 
Depending on how much lower level this is (come on! we are to the point of checking memvendorID!), it seems that NONE of the 0100's are freezing but more than a few of the 0600's are freezing.
Coincidence? I think not :)
 
Running Leopard with 1.3, no freezing ever aside from 10 minutes ago, when i finally got it to freeze while running multiple emulator programs at once and was messing with the performance config. Screen froze, mouse still moved.
Otherwise, I've put my mac through the loop in terms of gfx stuff and its always performed perfectly, never any artifacts or anything. I've been using it since Labor Day.

ioreg -l | grep ATY | grep Mem
| | | | "ATY,MemVendorID" = <0600>
| | | | "ATY,MemRevisionID" = <0100>
Click to expand...

Vendor: ATI (0x1002)
Device ID: 0x9583
Revision ID: 0x0000
ROM Revision: 113-B2250F-212
EFI Driver Version: 01.00.212
Click to expand...

So if 600 is faulty, which I don't think it is in my case because it only happened when I really pushed the system on not very stable software, this "fix" mentioned in the first post applies? or does it mean 600's will be recalled? Should I be worried?
 
MemVendorID" = <0600>
20" 2.4 Ghz/ Leopard

I just experienced my first couple of freezes since installing Leopard. I hope they release a software fix
 
Code: 
"ATY,MemVendorID" = <0600>
"ATY,MemRevisionID" = <0100>
Not a single freeze in Tiger, Leopard, or Vista x64 since purchase in early August.
 
"ATY,MemRevisionID" = <0900>
"ATY,MemVendorID" = <0100>

24" Aluminum, 2GB RAM (1G Apple, 1G Crucial), Tiger

Has frozen about 6 or 7 times in about 2 months of use, so about once a week. I pretty much use this computer exclusively for editing with FCP5. It usually freezes from there, but the latest freeze was while encoding in iDVD.

I'm well beyond my exchange period, and the problem is tolerable enough. Looking forward for a real fix. I have not upgraded the iMac Software Update since new (I guess I'm still running 1.0).

p.s. I don't think this is a heat-related issue. Sometimes, I render very effects-heavy timelines and the CPU is at 100% for hours, and the computer doesn't freeze. Then, I might move the mouse to scrub through a video and it would freeze. Still hoping it's a bad ATI driver.
 
Occasional lockups

I've had my iMac 20" just a few weeks. It's locked up a few times when I had
a lot of stuff open.

% ioreg -l | grep ATY | grep Mem
| | | | "ATY,MemRevisionID" = <0900>
| | | | "ATY,MemVendorID" = <0100>

Not good.
 
rico99 said:
I've had my iMac 20" just a few weeks. It's locked up a few times when I had
a lot of stuff open.

% ioreg -l | grep ATY | grep Mem
| | | | "ATY,MemRevisionID" = <0900>
| | | | "ATY,MemVendorID" = <0100>

Not good.
Click to expand...


I have these same revisions (stated on the first page) with not a a single freeze up. I do have a 24" iMac, so maybe there are slight differences.
 
Weak correlation or part of the problem?

A lack of sleep may be affecting me, but hear me out.

The correlation between vendor numbers and freezing iMacs seems weak, but there may an explanation for this.

If the problem is related to the vendor number is it possible that the problem is that the vendor numbers are wrong or being misread by the OS?

It is also likely that certain vendors have a higher incidence of faulty chips, but all of the chips from that vendor do not fail.

I believe that this problem has to do with OS X not getting the right information from the memory when the system is booted and this creates an instability in the system.

I need to stop speculating and go to bed. I hope this post is useful.
 
I'm afraid the issue it's not MemVendorID related:

"ATY,MemRevisionID" = <0100>
"ATY,MemVendorID" = <0600>

No freezing until now (knocking on wood), just 4-5 kernel panic but I think I found out what caused them. And I think that have been some with vendorID 0900 with the freezing issue :(.

By the way I'm running Tiger with the default installation, I don't know what software update version I got. How can I find out?
 
| | | | "ATY,MemVendorID" = <0600>
| | | | "ATY,MemRevisionID" = <0100>


No freezing ever. Running 10.5 via straight-up update.
 
Yeah, as has been mentioned already, it is unlikely that ALL of a given vendor's VRAM chips are faulty but they could have a contamination issue or could be running marginally on electrical spec or something. It may just be that a given vendor is less reliable than another vendor. Of course it is also possible that vendor 0600 is used in higher volumes than 0900 (or any other vendor) so that may give a distorted picture.

Out of interest, my system froze again last night immediately after waking up from sleep. I tried to click on the Mail icon in the dock as soon as the desktop appeared and it froze. Interestingly I didn't get the usual "ASIC Hang" message in system.log so maybe the software update changes the resulting behaviour of the freeze.

If I could be confident in getting a replacement or repair which would definitely fix this issue then I'd take it to my Apple store for repair/replacement now but I'm still not sure that Apple have a handle on this issue. My freezing issue seems to be much less of a problem than other people so I don't want to go backwards...

Cheers,
Craig.
 
no freezing here with Tiger or Leopard

Model Identifier: iMac7,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.4 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 3 GB

Chipset Model: ATI,RadeonHD2600

| | | | "ATY,MemVendorID" = <0100>
| | | | "ATY,MemRevisionID" = <0900>
 
"ATY,MemVendorID" = <0600>
"ATY,MemRevisionID" = <0100>

Chipset Model: ATI,RadeonHD2600
Type: Display
Bus: PCIe
PCIe Lane Width: x16
VRAM (Total): 256 MB
Vendor: ATI (0x1002)
Device ID: 0x9583
Revision ID: 0x0000
ROM Revision: 113-B2250F-207
EFI Driver Version: 01.00.207

You can count me as a "non-freezer" also.
Just never happens even though I have put it through most of the "triggers" I have seen detailed here.

20 inch, 4GB ram, Windows XP Pro in bootcamp. (No problems there either)
Currently running 10.5, but had zero problems prior to that either.
Hope the info helps.

WRC
 
A FREEZER, from day one, with all updates.

iMac 24" 2.2Mhz 500M HD



Shipped out from the Shanghai plant on August 18, 2007

-Last login: Sat Nov 10 06:04:18 on console
iMac:~ mayorloz$ ioreg -l | grep ATY | grep Mem
| | | | "ATY,MemVendorID" = <0600>
| | | | "ATY,MemRevisionID" = <0100>
iMac:~ mayorloz$

------

ATI Radeon HD 2600 Pro:

Chipset Model: ATI,RadeonHD2600
Type: Display
Bus: PCIe
PCIe Lane Width: x16
VRAM (Total): 256 MB
Vendor: ATI (0x1002)
Device ID: 0x9583
Revision ID: 0x0000
ROM Revision: 113-B2250F-212
EFI Driver Version: 01.00.212
Displays:
iMac:
Display Type: LCD
Resolution: 1920 x 1200
Depth: 32-bit Color
Built-In: Yes
Core Image: Hardware Accelerated
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Display Connector:
Status: No display connected
 
| | | | "ATY,MemVendorID" = <0600>
| | | | "ATY,MemRevisionID" = <0100>

EFI xx.xx.212 and no freezing here, in fact it's as smooth as butter.
See sig for specs.
 
I hope you're right - I'm going to give it another couple of weeks before I take it in for repair. My biggest problem is that I can't reproduce the problem easily - sometimes it run's fine for days without any trouble then it locks up at the slightest provocation, usually shortly after waking up. In bootcamp it will sometimes run fine for hours or it will lock up within 1 minute of playing a game. The lockup is always preceded by loads of white streaks like a meteor shower on dark backgrounds.

Cheers,
Craig.
 
| | | | "ATY,MemVendorID" = <0600>
| | | | "ATY,MemRevisionID" = <0100>

Freezer. But depends on boot.. Sometimes I can boot without having problems all day, sometimes I can boot with small artifacts showing in dock, freezing a min later.
 
craig1410 said:
I hope you're right - I'm going to give it another couple of weeks before I take it in for repair. My biggest problem is that I can't reproduce the problem easily - sometimes it run's fine for days without any trouble then it locks up at the slightest provocation, usually shortly after waking up. In bootcamp it will sometimes run fine for hours or it will lock up within 1 minute of playing a game. The lockup is always preceded by loads of white streaks like a meteor shower on dark backgrounds.

Cheers,
Craig.
Click to expand...

When i took mine in yesterday, the genius ran the visualizer and screensaver for 15 mins and it DIDN"T freeze. I then asked if he would restart the computer and try again. He did, after 30 seconds it froze after running the screensaver again. If you trying to reproduce it and it not freezing, try restarting it and trying again.
 
I read that ATI buys video memory from several vendors and then just assembles the video cards. That is why only some of the cards are affected.
 
Works fine...

iMac-24:~ risc$ ioreg -l | grep ATY | grep Mem
| | | | "ATY,MemVendorID" = <0600>
| | | | "ATY,MemRevisionID" = <0100>
iMac-24:~ risc$
 
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