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Description of problem: I've made a live USB stick with the --mactel parameter. When I put the usb stick into the macbook it loads grub. When I select boot it just gives a black screen. When I use the nomodeset command in the linux kernel line, it boots but, I get snow on the screen rather than an image. It is as if each row of pixels is shifted by about half the screen with. Most the screen is black though. Version-Release number of selected component (if applicable): F16 How reproducible: 1. Make live USB stick 2. put in macbook 8,2 3. turn on macbook Actual results: Either a black screen or a screen which is mostly black with some 'snow' on it if nomodeset is used. Expected results: a macbook running F16 of a live stick. Additional info: none.
I think this is a duplicate of Bug 765954. The problem occurs well before X is involved, near or right at GRUB handoff to the kernel, so I think this problem is much lower level. My (rudimentary) understanding is in CSM-BIOS boot (which does not support USB booting) disables Intel graphics on these machines, whereas EFI boot (which does support USB boot) enables both Intel integrated and AMD discrete graphics, so the problem might be a conflict.
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