[Bug 77831] [bisected regression] no backlight control any more (MacBook4,1)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=77831

--- Comment #4 from Matteo Cypriani <mcy at lm7.fr> ---
(In reply to Jani Nikula from comment #1)
> Aww crap. Please attach /sys/kernel/debug/dri/0/i915_opregion.

You already know it's empty, that didn't change, sorry ;-)


(In reply to Jani Nikula from comment #3)
> BTW do you have CONFIG_BACKLIGHT_APPLE=y? Have you tried the module?

I have CONFIG_BACKLIGHT_APPLE=m, the module apple_bl is loaded and I have a
directory "/sys/bus/acpi/drivers/Apple backlight", but I don't know what to do
with it.

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