On Fri, 2010-08-27 at 12:19 +0200, Andreas Heider wrote: > Hello everyone, > at the moment i'm trying to get vga_switcheroo working on a 2010 > macbook pro. This laptop has two graphics cards, a dedicated nvidia > one and an integrated intel arrandale chip. Switching is still pretty > rough but it kind of works and it's possible to get the intel card > connected to the display.
It would be interesting to know if there's a VBT on the machine at all anywhere. It might be hiding in an ACPI reserved or non-volatile region; /proc/iomem will show you where those are, and you can scrape them out of /dev/mem with clever use of dd(1). Or, Apple might have decided to do their own thing, in which case it's all much harder. The dual-channel LVDS thing you mention in the next message is a fair point. We should be able to just look at the native panel mode timings and _know_ whether it needs to be dual-channel. I think the break frequency is 112MHz, I'm sure the docs have the real number. - ajax
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