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 siknus,

    siknus siknus Sep 24, 2014 12:21 AM in response to babowa
    Level 1 (0 points)
    Sep 24, 2014 12:21 AM in response to babowa

    Thank you babowa. We'll know it sooner than later.

  • by Kwong Kian Tew,

    Kwong Kian Tew Kwong Kian Tew Sep 25, 2014 1:28 AM in response to santitf
    Level 1 (70 points)
    Sep 25, 2014 1:28 AM in response to santitf

    I have upgraded to 10.9.5 and I have not encountered any freezing using the new kexts that came with it for Radeon HD 2600 Pro.

     

    I did encounter issue with the external monitor going black for a couple of seconds intermittently. I selected another refresh rate in Systems Preferences -> Displays and then shutdown the computer before starting up again.

     

    So far I have not encountered any issues for the past 2 days.

     

    Seems like they may have fixed the kext but you may need to shutdown completely and then start the computer again for the new extensions to kick in?

     

    The kext now loaded in my system are :

     

    AMD2600Controller version 1.24.38

    AMDFramebuffer     version 1.24.38

    AMDSupport            version 1.24.38

    ATIRadeonX2000    version 8.24.16

  • by santitf,

    santitf santitf Sep 25, 2014 2:12 AM in response to Kwong Kian Tew
    Level 1 (0 points)
    Sep 25, 2014 2:12 AM in response to Kwong Kian Tew

    Really? I have to use the old kext since 10.7.... cause the freeze problems

  • by Kwong Kian Tew,

    Kwong Kian Tew Kwong Kian Tew Sep 25, 2014 5:10 AM in response to santitf
    Level 1 (70 points)
    Sep 25, 2014 5:10 AM in response to santitf

    It is certainly working fine for me at the moment and a little faster in fact, why not try by downloading the update package and reinstalling the update. Shutdown the Mac then and start up again. Check that the new kext are loaded instead of the old ones.

     

    If it still doesn't work, try restarting in safe boot and login before restarting the Mac again. I read that it clears certain cached data about the system and sometimes that helps.

  • by santitf,

    santitf santitf Sep 25, 2014 5:58 AM in response to Kwong Kian Tew
    Level 1 (0 points)
    Sep 25, 2014 5:58 AM in response to Kwong Kian Tew

    Ok. I try it tomorrow.

  • by forevermacintoe,

    forevermacintoe forevermacintoe Oct 2, 2014 6:28 AM in response to DazzaG
    Level 1 (0 points)
    Oct 2, 2014 6:28 AM in response to DazzaG

    After this last 10.9.5 update I had a little extra time for some problem solving.  I've tried the kexts fixes mentioned in this thread which seemed to sort of halp the issue, but freezes seemed to continue anyway to a point where I was never able to use the computer.  I never had any issues prior to Mavericks.  I have a mid-2007 27" iMac.

     

    So I installed Hardware Monitor: http://www.bresink.com/osx/HardwareMonitor.html

     

    This made the issue clear - GPU is overheating.  The temperature of the GPU specifically goes slowly climbs to it's maximum of 127C and shuts itself off (black screen).  Odd that I don't hear the fans turning up...  So I installed Macs Fan Control: http://www.crystalidea.com/macs-fan-control

     

    ...and there's the issue.  The fans are not responding to the increase in GPU temperature.  I believe there's an issue between the sensors and the fans in the new Maverick controller.  Either there is a GPU fan which is no longer recognized by the logic board, or the ODD fan isn't triggering based on the GPU diod temperature.

     

    Manually increasing the ODD fan (and somewhat the CPU fan) keeps the temperature under control.  Changing the HDD fan only makes it noisier. It's still running hotter than it should though, so I'm going to open it up and clean out and dust.  I'll update if I find anything more interesting.

  • by forevermacintoe,

    forevermacintoe forevermacintoe Oct 2, 2014 12:39 PM in response to forevermacintoe
    Level 1 (0 points)
    Oct 2, 2014 12:39 PM in response to forevermacintoe

    Just an update.  After open up the iMac I was able to easily rotate the ODD fan to point to the GPU.  The GPU was really running hot (I could feel it), but the heat wasn't properly transfering to the heat sink and fan on the left of the machine.  I almost never use the ODD and the GPU temp dropped about 20C with this small change.  There was not much dust, but I cleaned it out anyway.

     

    It's great having this Mac back.  It's 7 years old, but for watching movies, it's still killer.

  • by DataRusty,

    DataRusty DataRusty Oct 12, 2014 9:49 AM in response to DazzaG
    Level 1 (0 points)
    Oct 12, 2014 9:49 AM in response to DazzaG

    Hello everyone!

    I recently did a fresh install of Mavericks, and updated to 10.9.5 and had no freezes without applying the Kext fixes.

     

    I updated my Canon printer software (the only thing I installed) and had my first freeze the next morning. (someone mentioned that before? could it be that there's a connection there?)

     

    I tried to apply the Kext fixes from Krysztof, using the Kext Helper but according to System Information they weren't replaced (even though Kext Helper said they did) and I had another freeze.

     

    I tried pasting the files into the Library/... folder (and hitting on "replace") and it said something like they cannot be installed, because they are not properly signed and on System information still nothing has changed...

     

    Just installed the SMC fan controller and raised the fans to 3000. Im waiting to see if this might help.

     

    I need to use my mac for my university assignments and this just adds extra pressure. :-(

     

    Thanks for any information and help.

  • by DataRusty,

    DataRusty DataRusty Oct 12, 2014 10:01 AM in response to h4nds
    Level 1 (0 points)
    Oct 12, 2014 10:01 AM in response to h4nds

    hey! did you manage to install the fix on Mavericks? How? thanks

  • by santitf,

    santitf santitf Oct 12, 2014 2:52 PM in response to DazzaG
    Level 1 (0 points)
    Oct 12, 2014 2:52 PM in response to DazzaG

    Hi. After a week i have not freeze updating to 10.9.5 without fixing the old graphics files.

    The gpu temperature is around 50ºC like before (i use smcfancontrol to up a little the cpu and hdd fan rpm).

  • by Hugo_Loureiro,

    Hugo_Loureiro Hugo_Loureiro Oct 15, 2014 1:11 PM in response to DataRusty
    Level 1 (0 points)
    Oct 15, 2014 1:11 PM in response to DataRusty

    Did you delete the AMD kexts in /System/Library/Extensions?

    You should delete AMDFramebuffer, AMDSupport and the AMD kext specific for your graphics card. Or your mac will load the AMD instead of the ATI ones on boot and the extensions will continue causing problems.

  • by Tazthed,

    Tazthed Tazthed Oct 16, 2014 12:01 PM in response to DazzaG
    Level 1 (0 points)
    Oct 16, 2014 12:01 PM in response to DazzaG

    For those of you who have time to try the new Yosemite OS X and the freezing issue - you can now download and install it for free from Mac Store.

     

    I still use Mavericks and unfortunately I don't have time at the moment to backup and try the kext files.

  • by BatmanNewsChris,

    BatmanNewsChris BatmanNewsChris Oct 16, 2014 3:29 PM in response to DazzaG
    Level 1 (0 points)
    Oct 16, 2014 3:29 PM in response to DazzaG

    Has anyone been playing around with the Yosemite beta and know if it this is still an issue? Not sure if I want to upgrade just yet...    

  • by babowa,

    babowa babowa Oct 16, 2014 3:35 PM in response to BatmanNewsChris
    Level 7 (32,244 points)
    iPad
    Oct 16, 2014 3:35 PM in response to BatmanNewsChris

    I'd wait until the .2 or so update. It's never the best idea to dive in with an .0 release.

  • by Daniel Smith-Weiss,

    Daniel Smith-Weiss Daniel Smith-Weiss Oct 17, 2014 3:05 PM in response to babowa
    Level 1 (4 points)
    Mac OS X
    Oct 17, 2014 3:05 PM in response to babowa

    I'm running Yosemite without the fix to see how it goes. I usually took a week or two before I saw issues in the past (usually at the most inopportune time), so I'll report back if anything happens.

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