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 swmaster,

    swmaster swmaster Jul 31, 2012 1:13 AM in response to Tardigrada
    Level 1 (0 points)
    Jul 31, 2012 1:13 AM in response to Tardigrada

    mine says:

     

    Renderer: ATI Radeon HD 2400 XT OpenGL Engine
    Vendor: ATI Technologies Inc.
    Memory: 128 MB
    Version: 2.1 ATI-8.0.51
    Shading language version: 1.20

     

    when checking out the reports, it says for 85 extensions, that they were not found but be available in a later version of the driver.

    like this one here

     

    "GL_ARB_blend_func_extended was not found, but is available in driver version 3.3.10061 Core Profile Forward "

  • by swmaster,

    swmaster swmaster Jul 31, 2012 1:15 AM in response to George2705
    Level 1 (0 points)
    Jul 31, 2012 1:15 AM in response to George2705

    please try the opengl test app, needs some tweaking to get around the "stronghold" in ML as it is not from appstore. „OpenGL Extensions Viewer“

     

    please post the test results into the forum.

  • by CarlaBlue,

    CarlaBlue CarlaBlue Jul 31, 2012 2:45 AM in response to swmaster
    Level 1 (0 points)
    Jul 31, 2012 2:45 AM in response to swmaster

    @swmaster I agree with you on this,

     

    if you do some sort of gpu intensive stuff, your gpu will bite the dust.

     

    I noticed it was something related to GPU when I started getting these very odd pixel artifacts on Firefox and they stopped when turning off hardware acceleration. Hardware acceleration is basically using the GPU when it’s possible (instead of the CPU). And WebGL experiments like the ones from Chrome also cause it to crash and freeze.

     

    I have a 7,1 as well.

  • by jaycee1980,

    jaycee1980 jaycee1980 Jul 31, 2012 2:54 AM in response to CarlaBlue
    Level 1 (0 points)
    Jul 31, 2012 2:54 AM in response to CarlaBlue

    He is correct. The problem is not Flash, Firefox or <insert app here>. If an app makes your system freeze, it is a driver problem. An app itself cannot cause a system freeze, but if it is using some system feature that is broken, a freeze can happen.

     

     

    I dont think Apple will ever fix this. They are content to lie about the problem being "faulty hardware" when it is not the case. My ATI 2400 mac is in use daily under Windows 7 with no problems whatsoever, using the latest drivers from ATI.

     

    Apple simply cannot be bothered to fix the problem.

  • by CarlaBlue,

    CarlaBlue CarlaBlue Jul 31, 2012 3:09 AM in response to jaycee1980
    Level 1 (0 points)
    Jul 31, 2012 3:09 AM in response to jaycee1980

    Yes, I agree, the freezes and etc happen in spite of the app or browser you’re using. It is a driver problem. And Apple is not going to fix this, it has been 2 years...

  • by Tardigrada,

    Tardigrada Tardigrada Jul 31, 2012 4:33 AM in response to KrzysiuTurek
    Level 1 (9 points)
    Mac OS X
    Jul 31, 2012 4:33 AM in response to KrzysiuTurek

    KrzysiuTurek, I remember you did also a clean install when you came from Snow Leopard to Lion. Am I right, assuming that doing so did not ultimately fix the issue for you?

  • by Crimguy,

    Crimguy Crimguy Jul 31, 2012 8:16 AM in response to Tardigrada
    Level 1 (0 points)
    Jul 31, 2012 8:16 AM in response to Tardigrada

    Many have tried clean installs with Lion with no effect.  I think most have concluded it is a driver issue, so unless the driver has been fixed with ML you will still have a problem.

     

    All is not lost though.  I made it 4 days without a freeze! 

     

    Additionally, ML is running significantly faster and smoother with the 10.6.2 drivers installed.  With Lion it was a choppy mess.  Now my computer is running more or less "normally."  ML really put a new lease on life for my office iMac.

  • by KrzysiuTurek,

    KrzysiuTurek KrzysiuTurek Jul 31, 2012 9:58 AM in response to DazzaG
    Level 1 (0 points)
    Jul 31, 2012 9:58 AM in response to DazzaG

    @aieronimo - now I have installed ML (from day that it shows in app store) with no single freeze.

     

    @Tardigrada - Yes, I also made  Lion clean install. I just do it because I don't have any data to lose, and someone must check it

     

    Believe me or not but 80% of my freeze has happened when I used a site with flash elements. I'm don't say that flash is the main reason, but may have an impact.

  • by Tardigrada,

    Tardigrada Tardigrada Jul 31, 2012 11:24 PM in response to KrzysiuTurek
    Level 1 (9 points)
    Mac OS X
    Jul 31, 2012 11:24 PM in response to KrzysiuTurek

    I try to read between the lines, because you did not answer my question: So a clean install of Lion did not fix your issue, but you did it again with Mountain Lion, because you felt that it helped somewhat nevertheless.

     

    Why did you not just uninstall flash if you think that's the main problem? Flash comes with an uninstaller.

  • by dmaude,

    dmaude dmaude Aug 1, 2012 3:55 AM in response to dmaude
    Level 1 (0 points)
    Aug 1, 2012 3:55 AM in response to dmaude

    One week since kext-fixed ML. No freezes/crashes on my mid-2007 iMac since then. Applestore geniuses express bafflement.

     

    Quote from Sir Jonathan Ive, the designer of the iMac, in The Independent yesterday:

     

    "The hallmark of Apple products is real care..."

     

    "Our goal is not to make money – that may sound a little flippant but it happens to be true. Our goal, and what makes us exist, is to make great products."

     

    PS Another ML Catch-22. New Airport Utility can't manage ageing Airport Express. Apple's offered solution? Roll back to AU 5.6. Problem: ML won't allow that.

  • by George2705,

    George2705 George2705 Aug 1, 2012 4:06 AM in response to dmaude
    Level 1 (0 points)
    Aug 1, 2012 4:06 AM in response to dmaude

    Day 5 post ML...Still no freezes.

     

    Did the Open GL tests using the one available on Mac Store.

     

    No failed tests.

  • by aieronimo,

    aieronimo aieronimo Aug 1, 2012 4:53 AM in response to George2705
    Level 1 (0 points)
    Aug 1, 2012 4:53 AM in response to George2705

    Folks -- please indicate when noting your experience with freezes whether you are running Mountain Lion with or without the kext fixes.  And -- if without kext fixes -- whether you did an upgrade to Mountain Lion or a clean install.  Thanks.

  • by CJH_Canada,

    CJH_Canada CJH_Canada Aug 1, 2012 5:55 AM in response to Tardigrada
    Level 1 (0 points)
    Aug 1, 2012 5:55 AM in response to Tardigrada

    See jaycee1980's comment above: Flash is a trigger, because it is GPU intensive, but it is not the cause. Even if you uninstalled Flash, you will still get the freezing. At least, that is my experience.

  • by George2705,

    George2705 George2705 Aug 1, 2012 6:04 AM in response to aieronimo
    Level 1 (0 points)
    Aug 1, 2012 6:04 AM in response to aieronimo

    Sorry

     

    Mountain Lion and a clean install. 

    Kext fixes not yet applied as seems to be working for now.

     

    Nothing too GPU intensive being run yet, but will throw some video editing at it soon.

  • by eojwahs,

    eojwahs eojwahs Aug 1, 2012 6:13 AM in response to CJH_Canada
    Level 1 (0 points)
    Aug 1, 2012 6:13 AM in response to CJH_Canada

    Yeah, for me the trigger has been downloading podcasts from iTunes.  (See earlier in the thread and in Google about "allow simultaneous downloads.")  Not sure how that interacts with the GPU, but the kext rollback fixes it for me.

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