[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 #5 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to Matteo Cypriani from comment #4)
> (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.

Do you have it in /sys/class/backlight? Do you have
CONFIG_BACKLIGHT_CLASS_DEVICE=y?

-- 
You are receiving this mail because:
You are on the CC list for the bug.