DazzaG

Q: 24" iMac Screen Freezes since 10.6.3 update - pls help!

I don't know if this is just coincidence or not, but since updating my iMac to 10.6.3 it keeps on crashing. On 3 separate occasions today, whilst using my Mac the screen has gone completely black with thin white lines down it.....see pic below:

http://picasaweb.google.com/lh/photo/6SYzhCgVYEU5TBKqRfOQ1Q?feat=directlink

The fans and hard disk are still running but it will not respond to any keyboard or mouse presses - I simply have to turn it off by holding the power button in.
It will then restart as usual.

Anyone got any ideas? Do you think that if I was to re-install Mac OS X from my original install disk it could solve the issue?

Thanks

Darren

24" intel imac 2.8Ghz, Mac OS X (10.6.3)

Posted on Mar 31, 2010 2:43 PM

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Q: 24" iMac Screen Freezes since 10.6.3 update - pls help!

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  • by dna.barbour,

    dna.barbour dna.barbour Aug 1, 2012 7:18 AM in response to aieronimo
    Level 1 (4 points)
    Aug 1, 2012 7:18 AM in response to aieronimo

    As well, would posters discussing stability with ML mind clarifying if they're using a 7,1 or an 8,1, etc.? Thanks so much.

  • by George2705,

    George2705 George2705 Aug 2, 2012 2:48 AM in response to dna.barbour
    Level 1 (0 points)
    Aug 2, 2012 2:48 AM in response to dna.barbour

    Mac 8.1, day 6 and finally it crashes.

    Not doing anything particularly intensive.

    Screen went all white and had to do a hard reset.


    Will now be installing the Kext fixes.

  • by aieronimo,

    aieronimo aieronimo Aug 2, 2012 3:02 AM in response to George2705
    Level 1 (0 points)
    Aug 2, 2012 3:02 AM in response to George2705

    Thanks, George.  I think where we are is not surprising:  Mountain Lion does not change anything, but it seems from those who have tried the kext fixes that they work in Mountain Lion.  Hopefully, we'll be able to continue using Krzysiu's kext fixes until our computers are dropped from eligibility for the OS upgrades.

  • by George2705,

    George2705 George2705 Aug 2, 2012 3:13 AM in response to aieronimo
    Level 1 (0 points)
    Aug 2, 2012 3:13 AM in response to aieronimo

    Yes.

     

    I suppose my concern is when I come to sell this one to replace it, what do I say?

    I may not want to wait until the eligibility expires!

     

    I'm still frustrated that Apple don't seem to have any idea about the issue.

     

    The Genius Bar guys look very blank...even when I pointed them to this discusssion.

  • by TK111,

    TK111 TK111 Aug 2, 2012 7:46 AM in response to DazzaG
    Level 1 (0 points)
    Aug 2, 2012 7:46 AM in response to DazzaG

    Here's an update: 24" iMac 8,1   ATI Radeon 2600 Pro GPU

     

    Received a new GPU under warranty about 1.5 years ago. Since then, basically very few freezes, seemingly heat related. Running Mountain Lion now. Works well. Keeping an eye on heat in menu bar with Temperature Monitor Lite.

     

    So this experience shows me that it's not entirely a software related problem. It occurred to me this morning that it might be possible to buy a new 2600 Pro GPU and install it oneself to save some money, if a person wanted to save on costs.

     

    Googling for that GPU I find that there are firmware updates for it, some of them from support.apple.com itself. I never tried those on my iMac, and it might be worth doing that for people with no other solution available and who aren't totally happy with the kext fix (although the kext fixed worked for me to before I got the replacement). Try this:

     

    support.apple.com/kb/DL938

     

    or google: ATI Radeon 2600 Pro iMac update

  • by Tardigrada,

    Tardigrada Tardigrada Aug 3, 2012 1:37 AM in response to TK111
    Level 1 (9 points)
    Mac OS X
    Aug 3, 2012 1:37 AM in response to TK111

    I don't know anyone who was able to install FW Update 1.0.2. Also the updates list doesn't mention it at all. Strange …

     

    The “ROM Version” (about this mac → more info → Graphics/Display → ROM Version) of my Radeon is the one from FW Update 1.0.1. Thus “Your computer does not need this update.” does not seem right.

  • by Tardigrada,

    Tardigrada Tardigrada Aug 3, 2012 1:58 AM in response to Tardigrada
    Level 1 (9 points)
    Mac OS X
    Aug 3, 2012 1:58 AM in response to Tardigrada

    Is it possible that the issue was really fixed with FW Update 1.0.2 but nobody was able to install it, because the installer is broken?

     

    One user suggests trying to install the update after “a safe mode boot”. Did anyone try this?

  • by CarlaBlue,

    CarlaBlue CarlaBlue Aug 3, 2012 2:15 AM in response to Tardigrada
    Level 1 (0 points)
    Aug 3, 2012 2:15 AM in response to Tardigrada

    That firmware update was one of the things I tried to do one year ago when I thought it was something with my graphic card, my computer says it doesn't need it.

    The update is from 2009, I guess the updates for SL were shipping with that already.

     

    I am running a 7,1. So far the kext. fix is the only solution ( besides buying a new computer ) that I have seen that is effective.

  • by Tardigrada,

    Tardigrada Tardigrada Aug 3, 2012 2:45 AM in response to CarlaBlue
    Level 1 (9 points)
    Mac OS X
    Aug 3, 2012 2:45 AM in response to CarlaBlue

    CarlaBlue: Is your “ROM Version” (about this mac → more info → Graphics/Display → ROM Version) that from FW Update 1.0.1 (i.e. 113-B2250L-259 or 113-B2250H-259) or higher? Mine is not higher, thus I suspect the 1.0.2 updater ist broken.

  • by Tardigrada,

    Tardigrada Tardigrada Aug 3, 2012 3:38 AM in response to Tardigrada
    Level 1 (9 points)
    Mac OS X
    Aug 3, 2012 3:38 AM in response to Tardigrada

    Safe Mode

     

    To let you know the result of my test: The Safe Mode does not change anything about not being able to install FW Update 1.0.2.

     

    However this may be of interest to you: OS X 10.6.8 crashed trying to boot in Safe Mode with the 10.6.2 kernel extensions. In fact it mentions them further down the error message. Thus I had to temporarily re-install the 10.6.8 kernel extensions to be able to start in Safe Mode.

  • by Tardigrada,

    Tardigrada Tardigrada Aug 3, 2012 4:57 AM in response to Tardigrada
    Level 1 (9 points)
    Mac OS X
    Aug 3, 2012 4:57 AM in response to Tardigrada

    As noted before, the FW Update 1.0.2 installer creates an interesting log entry (see console):

     

    “Package Authoring Warning: Package reference does not include required hash for package id auto.”

     

    But maybe it doesn't mean anything important, I don't know.

     

    Some people have “fixed” the freezing issue by replacing their GPU. I really wonder what their “ROM Version” is. If it is higher than 113-B2250L-259 or 113-B2250H-259, it would be an evidence that a firmware update could be the final solution to this issue.

  • by TK111,

    TK111 TK111 Aug 3, 2012 6:20 AM in response to Tardigrada
    Level 1 (0 points)
    Aug 3, 2012 6:20 AM in response to Tardigrada

    The ROM version on my replaced 2600 Pro GPU is 113-B2250L-259. I guess firmware updates aren't going to help anyone. I'd try it on my system but it's working and I'm afraid to touch it.

  • by richard.s.hall,

    richard.s.hall richard.s.hall Aug 3, 2012 7:46 AM in response to dna.barbour
    Level 1 (0 points)
    Aug 3, 2012 7:46 AM in response to dna.barbour

    Just for another point of reference, I have:

     

    Model Identifier:iMac7,1
      Processor Name:Intel Core 2 Duo
      Processor Speed:2 GHz

     

    With:

     

      Chipset Model:ATI,RadeonHD2400
      Type:GPU
      Bus:PCIe
      PCIe Lane Width:x16
      VRAM (Total):128 MB
      Vendor:ATI (0x1002)
      Device ID:0x94c8
      Revision ID:0x0000
      ROM Revision:113-B2250A-207
      EFI Driver Version:01.00.207

     

    I upgraded to Mountain Lion and my machine froze after a few minutes worth of use, so definitely no fix in Mountain Lion. I've applied the 10.6.2 kext files and have been running happily ever since:

     

    $ uptime

    10:45  up 4 days,  1:38, 4 users, load averages: 1.03 0.89 0.84

  • by Tardigrada,

    Tardigrada Tardigrada Aug 3, 2012 11:48 AM in response to TK111
    Level 1 (9 points)
    Mac OS X
    Aug 3, 2012 11:48 AM in response to TK111

    TK111: Thank you! Do I understand you right, that the trouble-free one (the replacement) has 113-B2250L-259 as “ROM Version”?

  • by TK111,

    TK111 TK111 Aug 3, 2012 11:49 AM in response to Tardigrada
    Level 1 (0 points)
    Aug 3, 2012 11:49 AM in response to Tardigrada

    Yes, that's right, Tardigrada.

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