Greetings. I recently go the nerve to go about installing Mountain Lion on my early 2008 Macbook. I decided to go the long way around to solve the x3100 issue, though. I basically have a Radeon 6670 running in it (powered with a auxiliary power supply triggered with a 5v relay spliced onto the power going to the SATA drive).
Long story short, it works well and performance is great (despite showing as just a 6xxx Radeon, the 6670 wasn't as out-of-box good as I'd come to believe looking at some sites).
The first problem I seem to have is that the Macbook is very insistent that there is a 800x600 display connected to the internal X3100 (it shows "No Kexts Loaded" in the Profiler for it as i haven't copied the Lion drivers over). The thing is that by using a mini-dvi to vga adapter, I'm actually getting video over it (used this when first running ML in case the Radeon wasn't working right). I've even put a magnet over the sleep sensor (sleep light shows up right as if the lid was closed) but it still sees that display connected.
The second problem is that it won't see the Radeon and the display connected to it unless I do a PRAM reset when starting up the first time. Its fine with a plain restart and doesn't have any problem with seeing the Radeon after that.
Anyone have any clues? I know it was never meant to have anything aside from an Airport card in the mini pci -e slot. Still it is a fully compatible pci-e slot (though running at only x1). Its an interesting thing to do with an aging Macbook.
Long story short, it works well and performance is great (despite showing as just a 6xxx Radeon, the 6670 wasn't as out-of-box good as I'd come to believe looking at some sites).
The first problem I seem to have is that the Macbook is very insistent that there is a 800x600 display connected to the internal X3100 (it shows "No Kexts Loaded" in the Profiler for it as i haven't copied the Lion drivers over). The thing is that by using a mini-dvi to vga adapter, I'm actually getting video over it (used this when first running ML in case the Radeon wasn't working right). I've even put a magnet over the sleep sensor (sleep light shows up right as if the lid was closed) but it still sees that display connected.
The second problem is that it won't see the Radeon and the display connected to it unless I do a PRAM reset when starting up the first time. Its fine with a plain restart and doesn't have any problem with seeing the Radeon after that.
Anyone have any clues? I know it was never meant to have anything aside from an Airport card in the mini pci -e slot. Still it is a fully compatible pci-e slot (though running at only x1). Its an interesting thing to do with an aging Macbook.