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    SubjectRe: [PATCH v2] platform/x86: Add driver for Apple gmux device
    On Thu, Mar 15, 2012 at 10:47:56AM -0500, Seth Forshee wrote:

    > Turns out that acpi_video0 does work under Windows, and it also works
    > under Linux depending on how the OS is booted. Doing a boot camp style
    > boot gives us working acpi_video0 and apple_bl backlights. acpi_video1
    > doesn't show up in a legacy boot situation, as evaluating _BCM gives an
    > error.
    > Under EFI boot, both acpi_video backlights show up but neither works.
    > The readback verify in apple_bl's probe fails, so that one doesn't show
    > up. Only gmux_backlight actually works.

    Ok, that's consistent. You can probably handle that case by just calling
    acpi_video_unregister() in gmux. Something like your patch looks fine
    for the apple_bl case.

    Matthew Garrett |

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