Linux Display Switching Support For Apple MacBooks
Canonical and others continue to hack on rudimentary support for graphics display switching for Apple MacBook laptops bearing multiple graphics processors.
Seth Forshee on Tuesday published his latest work in this area for Apple display switching support to the kernel mailing list. The patches build upon vga_switcheroo to support display switching with the GMUX. While these three patches allow for display switching, graphics drivers may still have issues with this support on Apple hardware due to missing/invalid vBIOS information on Apple computers. The patches at least fix a GMUX state restoration issue that some MacBook users have seen.
This series adds display switching support for Apple laptops. The first two patches contain preparatory changes to vga_switcheroo, and the third contains the changes to support display switching with the gmux.Matthew Garrett has also been working on Apple GMUX support for the newer Apple Intel/NVIDIA graphics hardware per these patches from this week. Matthew Garrett's been playing around with an Apple Retina MacBook Pro and trying to better the Linux support, but from my testing thus far, I absolutely cannot recommend running any Linux distribution at this time bare-metal on Apple's newest notebook with its incredible display. There's many outstanding problems and all of the issues will likely not be all ironed out and found in tier-one distributions until early next year at least.
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