apple/macbook-pro/11-5: document amdgpu driver choice
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@ -22,11 +22,19 @@ This configuration will **not** work with MacBook Pro 11,2 or 11,3 models.
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## Graphics
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## Graphics
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The [MacBookPro11,4 and MacBookPro11,5](https://support.apple.com/kb/SP719) models ship with a discrete ATI graphics card (whereas MacBookPro11,2 and MacBookPro11,3 ship with NVidia cards). This is alongside the usual integrated Intel GPU.
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The [MacBookPro11,4 and MacBookPro11,5](https://support.apple.com/kb/SP719) models ship with a discrete ATI/AMD graphics card (whereas MacBookPro11,2 and MacBookPro11,3 ship with NVidia cards). This is alongside the usual integrated Intel GPU.
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You may wish to look into dynamic switching between integrated and discrete graphics, but this config doesn't attempt it.
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You may wish to look into dynamic switching between integrated and discrete graphics, but this config doesn't attempt it.
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Currently this uses the experimental `si_support` to disable the older radeon driver and enable the more modern `amdgpu` driver.
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## Additional resources
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## Additional resources
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* Arch linux wiki: [MacBookPro11,x](https://wiki.archlinux.org/index.php/MacBookPro11,x)
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* Arch linux wiki: [MacBookPro11,x](https://wiki.archlinux.org/index.php/MacBookPro11,x)
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* Kernel patches: [MacBookPro11,x](https://bugzilla.kernel.org/buglist.cgi?quicksearch=macbookpro11)
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* Kernel patches: [MacBookPro11,x](https://bugzilla.kernel.org/buglist.cgi?quicksearch=macbookpro11)
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For more context about experimental `amdgpu` support, see:
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* [Enabling AMDGPU by default for SI & CIK (November 2021)](https://gitlab.freedesktop.org/drm/amd/-/issues/1776)
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* [Enabling AMDGPU by default for SI & CIK (August 2020))](https://lists.freedesktop.org/archives/amd-gfx/2020-August/052243.html)
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* [Feature support matrix](https://wiki.gentoo.org/wiki/AMDGPU#Feature_support)
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