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Just tried the kext replace again using only the 2 IO kexts mentioned earlier from 10.6.0 into 10.6.8. Gets past the Apple and freezes/hangs at grey screen. Not sure why this kext swap is hanging things where others have had such success. Thoughts? Gah.
 
I confirmed that the computer has the 2400HD. I upgraded to 10.6.8 and did the kext wizard replace with the 3 recommended From 10.6.2 on the linked site (atiframebuffer, atisupport, ati2400controller) and got a kernel panic on boot.

I reinstalled the OS as safe boot would also panic (not inspiring), upgraded to 10.6.8, and tried the kext wizard replace with the full list that Intell listed above, with all extracted with Pacifist from 10.6.2 except the IO kexts from 10.6.0. Kernel panic again on restart; same panic when safe boot is attempted.

I'm currently reinstalling the OS again, but not sure what to try now: just the IOGraphicFamily and IONDRVSupport by themselves from 10.6.0 into 10.6.8? Perhaps I am missing something? Any feedback would be great. Thanks everybody.


Yeah I just used the swap with the directions described in post 114. Now it restarts to a panic on regular boot and safe mode. Not terribly thrilled. Is this iMac bricked?
 
Re Bricked: well it's "good" to know someone else had the same problem. You should be fine: just use a 10.6 disc and reinstall the OS. You won't lose any user info, only 30 minutes of your life ;)
 
I unfortunately cannot help trouble shooting right now or for about a week. I do know that when I was trying to mess with my iMac's kexts, I got plenty of kernel panics at boot. After a while I got it all working.
 
No worries. When you get a chance, just let me (us) know how you fought your way through it :)
 
Ah, I think I see: as the iMac I'm working on is a 7,1 model, it would appear from this gigantic thread (and other documents) that it will not boot into 64-bit mode with Snow Leopard (but it will with Lion and M. Lion):

https://discussions.apple.com/thread/2384136?start=0&tstart=0

Apparently (?) 10.6.7 with the 10.6.2 kexts works fine, but 10.6.8 with those same kexts will panic unless running in 64-bit mode, which is an option on a 8,1 or later but a no-go with the 7,1 (again, apparently; haven't tried yet).

Still curious to get your input when you have time, Intell: I forget if you mentioned it, but are you on a 7,1 as well? I'll most likely try the 10.6.7 with .2 kexts, and also whatever fix you have had success with in overcoming these kernel panics, but it sounds as though Lion (and perhaps Mountain Lion) on the 7,1 with the 10.6.2 kexts is working well for people. May end up down that road eventually...
 
I have same model, has only done that twice in 5 years. After permissions repair it was okay. Running SL, latest version , and has never frozen since upgrading RAM to 4 gb, the only recurring problem I have is with Mail, spinning beach ball and very slow to quit sometimes.
 
I have a 7,1. I've done a bit of thinking about what exactly I did to my current OS on it. I reinstalled Snow Leopard and updated it to 10.6.6. I then copied the Extensions folder while preserving the permissions. I updated to 10.6.8 and installed the newest, at the time, security updates. After that was done I put the 10.6.6 extension folder back with the proper permissions.
 
Interesting. I tried both kext Helper and Wizard and I thought (incorrectly?) they would set the permissions properly; I even repaired permissions after I installed the kexts. Hmmm. I suppose I could try to set them manually.

Perhaps it comes down to the revision of the card as well, yours being stable with 10.6.6 and mine with 10.6.2.

Thanks.
 
I have a 7,1. I've done a bit of thinking about what exactly I did to my current OS on it. I reinstalled Snow Leopard and updated it to 10.6.6. I then copied the Extensions folder while preserving the permissions. I updated to 10.6.8 and installed the newest, at the time, security updates. After that was done I put the 10.6.6 extension folder back with the proper permissions.

Hi, i replace the kext whit the steps you mention earlier, but my imac didnt load when i reestar , just stay in the white screen, im in ML, i dont if that might be the problem

I have a imac mid 2007 whit the same graphics card as you, what can i do??
 
Mountian Lion likely does not have the GPU bug. You should only replace your kexts if your system is 10.6.7 or 10.6.8. Anything newer, and you'll have problems.
 
They are so full of it

I took my machine to the apple store today. I saw one of the genius guys (not so sure about the name). He told me that this is not a known issue and apple have not recoded it as one. Hhmmm. He ran a few basic checks whilst I explained the background and I showed him all of the info that you have all come up with. I was told not to pay attention to forums and that they would have sold millions of the same machine and maybe 100 out of that million may have problems which does not constitute apple to make a fix. Hhhmmmm. He then told me the price of a replacement graphics card (about $265AUS). Ha ha, not likely!
I have left it with them overnight so that they can run a full diagnostic on the machine to see what they can come up with. I'd put money on it that they say "you just need a new graphics card/machine" So I'm sad to report that I don't hold any hope of getting this problem sorted. I have always owned and used apple but I'm really unhappy about this, to me it seems that they can outdate a perfectly good machine by making (or not) little changes here and there. Which then forces people to buy a new machine that will then be outdated again in a few years. NOT HAPPY.

They are so full of it - If I had a dime for every time they said they know what it is and that it's just a few computers and not at all widespread....



I've had this same corruption issues with my iMac for years. I have an iMac running snow leopard 10.6.8 and I've had these "Invalid volume file count" and "Invalid volume directory count" errors for over 3 years. Nothing I have done to try and fix this has worked. I've replaced RAM, I've replaced the logic board, I've replaced the graphics card, I've repalced the HD, I've replaced the power supply, I've gone through every software uninstall, reinstall, reset, recreate accounts, re-whatever imaginable and I still get these errors regularly. There is not one solution imaginable I have not tried short of throwing my Mac out the window. I would say I've had as many problems with my iMac as I had with my Dell prior to switching to Apple.

I know the corruption problem and freezing is coming when I start seeing weird lines running across my screen or weird font distortions. I often get the Mac's version of the blue screen of death - everything freezes and the beach ball starts spinning after a while. I've contacted Steve Jobs and Tim Cook about this and although they had senior techs call me to try figure it out, no one could resolve the issue for longer than a week or so. I have to repair my disk about 2 or 3 times a week. Apple can make up every excuse in the book but in the end they have not been able to fix my computer for well over 3 years and they still won't admit it's a manufacturers defect and they're not willing to do anything about it. They were just waiting for the Applecare protection to run out so they could get rid of me. Quite unbelievable!

----------

I confirmed that the computer has the 2400HD. I upgraded to 10.6.8 and did the kext wizard replace with the 3 recommended From 10.6.2 on the linked site (atiframebuffer, atisupport, ati2400controller) and got a kernel panic on boot.

I reinstalled the OS as safe boot would also panic (not inspiring), upgraded to 10.6.8, and tried the kext wizard replace with the full list that Intell listed above, with all extracted with Pacifist from 10.6.2 except the IO kexts from 10.6.0. Kernel panic again on restart; same panic when safe boot is attempted.

I'm currently reinstalling the OS again, but not sure what to try now: just the IOGraphicFamily and IONDRVSupport by themselves from 10.6.0 into 10.6.8? Perhaps I am missing something? Any feedback would be great. Thanks everybody.

I've had this same corruption issues with my iMac for years. I have an iMac running snow leopard 10.6.8 and a RadeonX1600 and I've had these "Invalid volume file count" and "Invalid volume directory count" errors for over 3 years. Nothing I have done to try and fix this has worked. I've replaced RAM, I've replaced the logic board, I've replaced the graphics card, I've repalced the HD, I've replaced the power supply, I've gone through every software uninstall, reinstall, reset, recreate accounts, re-whatever imaginable and I still get these errors regularly. There is not one solution imaginable I have not tried short of throwing my Mac out the window. I would say I've had as many problems with my iMac as I had with my Dell prior to switching to Apple.

I know the corruption problem and freezing is coming when I start seeing weird lines running across my screen or weird font distortions. I often get the Mac's version of the blue screen of death - everything freezes and the beach ball starts spinning after a while. I've contacted Steve Jobs and Tim Cook about this and although they had senior techs call me to try figure it out, no one could resolve the issue for longer than a week or so. I have to repair my disk about 2 or 3 times a week. Apple can make up every excuse in the book but in the end they have not been able to fix my computer for well over 3 years and they still won't admit it's a manufacturers defect and they're not willing to do anything about it. They were just waiting for the Applecare protection to run out so they could get rid of me. Quite unbelievable!
 
Mountian Lion likely does not have the GPU bug. You should only replace your kexts if your system is 10.6.7 or 10.6.8. Anything newer, and you'll have problems.

I've experienced 5 GPU crashes since upgrading to OS X Mountain Lion.
 
I am wondering if anyone on here has tried running another OS such as ubuntu or Windows? would like some feedback, I am having the same issues with my 2007 iMac ATI radeon 2600 HD. I have tried running Snow Leopard and Lion and also Now Mountain Lion. I am going to test with Ubuntu tonight so will post if I find anything.
 
My Windows XP and 7 Boot Camp partitions do not suffer from this software bug because Apple didn't write the drivers for Windows, ATI/AMD did. This only further shows that this is not a hardware problem, but a software issue that Apple is not fixing or acknowledging.
 
My Windows XP and 7 Boot Camp partitions do not suffer from this software bug because Apple didn't write the drivers for Windows, ATI/AMD did. This only further shows that this is not a hardware problem, but a software issue that Apple is not fixing or acknowledging.

OK, so the GPU bug is still in OS X Lion and OS X 10.7.5 developer preview. But, now, whenever I need to force shut down my computer, once I boot back up it recognizes there was a problem. "You shut down your computer because of a problem"
 
OK, so the GPU bug is still in OS X Lion and OS X 10.7.5 developer preview. But, now, whenever I need to force shut down my computer, once I boot back up it recognizes there was a problem. "You shut down your computer because of a problem"

Is there button to report the problem to Apple? If you're the type of person that clicks that button, click it. Maybe Apple will realize that the issue is still there.
 
Is there button to report the problem to Apple? If you're the type of person that clicks that button, click it. Maybe Apple will realize that the issue is still there.

No report button -.- This needs to be brought to Apple's attention now. Crashes are so much more frequent. This is my third attempt at writing this comment, as my machine has already frozen up twice.

GAH!!!
 
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No report button -.- This needs to be brought to Apple's attention now. Crashes are so much more frequent. This is my third attempt at writing this comment, as my machine has already frozen up twice.

GAH!!!

Isn't there an auto-report-stuff-to-apple setting in the system preferences?
 
Isn't there an auto-report-stuff-to-apple setting in the system preferences?

Yeah. I've enabled that, but Apple gets thousands of those daily. I've filed a few Developer Bug reports. One was answered, saying that their engineers are investigating the issue. Other than that, no response.
 
Developer bug reports usually get nowhere.

I'm having the same issue now, on my 7.1 iMac. Radeon HD2400 freezes every half an hour or so on Mountain Lion and Lion. Checking console confirms that it's a GPU problem.

Is it the consensus that this is an issue that can't be fixed in Lion/Mountain Lion? Could this possibly be fixed by replacing a video card, or is the only way out going back to 10.6.8?
 
A new video card won't help. This isn't a hardware problem. You might be able to use 10.6.6 video kexts on 10.7 or 10.8 and get it working. Going back to 10.6.8 will still give you problems as that version of Snow Leopard has the GPU bug as well.
 
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