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

[Mindflux]

Post up your MemVendorID of your card. State whether you have freezing or not. Follow the steps below.

This was posted in the macrumors news regarding the possible hardware issue in iMac's.

guys, i mentioned before i use to intern at ATI in the apple group. I contacted some people there, they finally answers. They said it has to do with the memory id on the graphics chip. They are NOT the same on all cards, they use different vendors for the memory on the graphics card. The problem occurs at boot, that's why the freezing is random. Look at the MemVendorID for those that are freezing. They should all be the same.

They also told me they working on the fix and it will be released next week. I already gave my mac in today to change the logic board and ATI chip, just wanted to let others know.

Run this in a Shell:

ioreg -l | grep ATY | grep Mem

Post both the MemVendorID and MemRevisionID and state your freezing issues (if any)

 

[Bolteh]

I checked System Profiler, can't really find a VenderID anywhere..

 

[Dr. Cheesesteak]

Is this the field "Vendor"?

If so, mine is ATI (0x1002) and it is a freezer.

 

[mbcracken]

Here is everything from mine:

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

I am not freezing other then iTunes taking 5 minutes to load everytime I start it up. I have a very small library of music with no movies or shows.

I am still on 10.4.10 but running latest iTunes.

Cheers,
mike

 

[Foxer]

Vendor: ATI (0x1002)


No freezing issues whatsoever.


(Touch wood).

 

[Mindflux]

Hrmm yes I can't find anything with MemVendorID either. Interesting. Wonder where we could pull that from.

 

[JayLenochiniMac]

ATI Radeon X1600 in the 20" white iMac is also ATI (0x1002) for vendor. Doesn't sound like it's the same as MemVendorID.

 

[brop52]

ATI (0x1002)

No freezing besides some incompatibilities with applications in Leopard. Programs quit unexpectedly. Of course it happened in Tiger too with some old programs.

 

[samt14]

this info is not true

 

[Mindflux]

go to terminal, then type:

ioreg | grep ATY

you should then see memvendorid

Wow, congrats on that not working.

ioreg -l (lowercase L) | grep ATY works.

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

So:
MemVendorID = 0100
MemRevisionID = 0900

Have had had NO lockups to date with Tiger with any of the updates sans 1.2.1 (since I'm in Leopard now), and no lockups in Leopard with 1.3

 

[Sun Baked]

Haven't had a problem...

"ATY,MemVendorID" = <0600>

 

[craig1410]

I have had some freezing, even since update 1.2.1.
I also get white speckles on black backgrounds when moving other windows around.
Also have had white speckles and lockups in bootcamp when running 3D games but sometimes after a reboot it is fine

MemVendorID = 0600
MemRevisionID = 0100

 

[Marble]

Mine freezes except using Tiger with Software Update 1.0.

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

 

[mbcracken]

MemVendorID = 0600
MemRevisionID = 0100

This is what I have as well.

 

[Mindflux]

This is what I have as well.

And your iMac does what? Locks up? None? Occasional? BBQ?

 

[craig1410]

And your iMac does what? Locks up? None? Occasional? BBQ?

See his earlier post.

 

[JayLenochiniMac]

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

No freezing here.

 

[Bigtree]

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

Freezes a little.

 

[bienagaver]

Freeeeezing

iMac 20" 2.4 Ghz 1Gb Memory
ATI Radeon HD 2600

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

No freezing since update 1.2.1 Tiger

 

[wakerider017]

Is it just me or does MemVendorID" = <0600> look like the problem child?

 

[Sun Baked]

Is it just me or does MemVendorID" = <0600> look like the problem child?

Who was the one with two machines 10 serial #'s apart -- one freezing the other not.

Would be more telling if that was two different VRAM memory IDs...

 

[kkat69]

Is it just me or does MemVendorID" = <0600> look like the problem child?

Def looks that way, I have this as well:

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

Looks like I'm def taking it in for replacement.


MemVendorID MemRevisionID Freeze
Mindflux 0100 0900 No
Sun Baked 0600 ???? No
craig1410 0600 0100 Yes
Marble 0600 0100 Yes
mbcracken 0600 0100 No?
JayLenochiniMac 0100 0900 No
Bigtree 0600 0100 Yes
bienagaver 0600 0100 Yes
kkat69 0600 0100 Yes

 

[Luap]

20" 2.4ghz 2Gb Leopard. Freezes very occasionally (A lot more in Tiger). UT2004 being the main trigger. General finder/screen saver/dock stuff is fine.

MemVendorID = 0100
MemRevisionID = 0900

 

[Eddiestein]

MemVendorID = <0600>
MemRevisionID = <0100>

No freezing on this 20" AL iMac.

 

[BKKbill]

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

No freezing second alum iMac

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

NO lockups to date with Tiger 24"