Jump to content

Very strange problem with ATI 4870 + 10.6.5


1 post in this topic

Recommended Posts



I recently updated my Hacktintosh from 10.6.3 to 10.6.5, and am getting some very strange behaviour from my Sapphire 1GB 4870 Vapor-X. Since I've read that the vanilla drivers / framebuffer are now compatible with the 4870, I left ATI4800Controller.kext, ATIFramebuffer.kext, and ATISupport.kext untouched, and simply turned on GraphicsEnabler=Yes in com.apple.plist. I am using PC-EFI 10.6.


As expected, everything worked fine; full QE/CI and full res .... but only for one boot. The next time I rebooted, I got video corruption upon entering the OS. I tried booting with the caches ignored, but no dice. I then tried booting into safe mode and rebuilding the kext caches, but still nothing. Finally, I booted into safe mode, turned off GraphicsEnabler from com.apple.plist, and decided to revert back to ATY_Init.kext. I rebooted (normally), and everything worked fine ... for one boot.


After more than a dozen or so tries using different combinations, I've come to the conclusion that the only way I can get the system to boot into the normal OS is to first boot into safe mode, and then toggle from either using GraphicsEnabler=Yes + no ATY_Init.kext, or GraphicsEnabler=No and using ATY_Init.kext. It doesn't matter which of the two it is, as long as its been toggled from the other state. That is, using GraphicsEnabler=Yes twice in a row will fail, using ATY_Init.kext twice in a row will fail, but somehow switching from one to the other (whichever that may be), will result in a successful boot.


Also, this toggling must be done in safe-mode only. Changing between the methods while in a successful boot (normal OS) will still result in failure for the next boot.


Also, for the record this card has worked fine for many updates from 10.5 - 10.6.3.


Does anyone have any clue as to why this may be happening? Any help would be greatly appreciated.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...