Previous 1 4 5 6 7 8 Next 111 Replies Latest reply: Dec 13, 2007 11:07 PM by spellboundxxi Go to original post
  • samt14 Level 1 Level 1 (10 points)
    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.
  • JEAN GUY NIQUET Level 1 Level 1 (30 points)
    Thank you very much samt14, where do you see the MemVendorID?
  • samt14 Level 1 Level 1 (10 points)
    No problem,
    Goto terminal do:

    ioreg | grep ATY,Mem

    Take a look at: "ATY,MemVendorID".
  • Scorpie Level 1 Level 1 (130 points)
    From what it sounds like to me, it's probably an internal thing that only ATI and Apply can take a look at. At worst it might be the actual video memory on the card, meaning we'd have to be able to physically see the card...

    But that's just a guess, and nothing in the System Profiler is indicative of that MemVendorID.

    Ah, I stand corrected. Thanks samt14. Would you happen to know what a "bad" value might be?

    Message was edited by: Scorpie
  • samt14 Level 1 Level 1 (10 points)
    +Ah, I stand corrected. Thanks samt14. Would you happen to know what a "bad" value might be?+

    Unfortunately no, they just told me to email them my memvendorID and they would tell me if the fix coming up would fix it or not. I don't think i'm really supposed to be posting all this but i just know how frustrating it is waiting and trying to guess what's wrong with the system. Furthermore, since i gave my mac in already to be fixed i was unable to do that. What i suggest is you list your value and somehow if u can, compare it with people who DON"T have freezing. Yours should be different. i.e. all freezing macs should have same memvendorid. The good news on this is that the chipset isn't the problem, and there isn't a hardware defect per say, just an incompatibility that doesn't flush/or whatever the memory at startup.
  • Scorpie Level 1 Level 1 (130 points)
    My iMac has been fine since iMac Software Update 1.2 came out. Thanks for the additional information.
  • JEAN GUY NIQUET Level 1 Level 1 (30 points)
    I copied and pasted your line into terminal but nothing shows, it goes back to prompt, syntax problem? (no terminal king here ... )
  • samt14 Level 1 Level 1 (10 points)
    No there is no syntax problem, Scorpie tried it and got a value i think. I'm on my macbook and thus won't get a value if i tried it. Try this:

    ioreg | grep ATY

    That will list all Ati info. then manually look for mem
  • JEAN GUY NIQUET Level 1 Level 1 (30 points)
    Nope, it gives that:

    ATY,Hypoprion@0 <class IONDRVDevice, registered, matched, active, busy 0, retain 7>
    ATY_Hypoprion <class ATY_Hypoprion, registered, matched, active, busy 0, retain 11>
    ATY,Hypoprion@1 <class IONDRVDevice, registered, matched, active, busy 0, retain 7>
    ATY_Hypoprion <class ATY_Hypoprion, registered, matched, active, busy 0, retain 9>
  • samt14 Level 1 Level 1 (10 points)
    i don't know what to tell you, i can't verify it myself unfortunately...maybe others have some more results
  • JEAN GUY NIQUET Level 1 Level 1 (30 points)
    Ok, waiting for others' results. Thanks.
  • 13lackmagic Level 1 Level 1 (0 points)
    ahh i just love how my posts magically disappear from this site anytime i offend the great apple gods....who knows how long this one will stay up?

    im doin a wipe and reinstall......doubt it will fix anything. after that im moving on to hardware replacement if no changes. someday far off...ill hopefully be able to use this nice piece of hardware. btw, to anybody who cares, i lugged my imac across campus to get repairs, and they basically charged me 30 bucks to uninstall norton, ruin my windows partition, and see if the hardware was ok. So i'd recommennd just doin a clean wipe and reinstall before doing anything, but i bet you already know that.
  • samt14 Level 1 Level 1 (10 points)
    Jean, others telling me the code is actually:


    ioreg -l | grep ATY | grep Mem

    where the -l is a LOWERCASE L
  • JEAN GUY NIQUET Level 1 Level 1 (30 points)
    OK, here it is:

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

    My iMac froze 3 times 3 weeks after I got it at the end of August (twice in Frontrow, once while encoding in iDVD, never froze again since. I applied update 1.3.
  • doc_in_bc Level 1 Level 1 (0 points)
    Jean,

    Get your i-Mac replaced ... I did with mine and I'm nowhere near an Apple store. They shipped me a new computer, I copied my files over to it and returned the defective unit to them. No cost to me. The replacement computer works flawlessly. I'm convinced there were a batch of bad graphic cards.

    There has been speculation about heat failures, etc., but I'm using the new i-Mac with the same applications that were causing problems before and they don't cause a ripple with this machine ... now running Leopard.

    Again, my advice is not to piddle with the thing ... get it replaced.

    Cheers

    Doug
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