[Bug 75085] Backlight does not increase to maximum on Lenovo Yoga 2 Pro

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75085

--- Comment #4 from Chris Wilson <chris at chris-wilson.co.uk> ---
Neither, just a misfeature in your ACPI firmware. The prevailing opinion is
that the ACPI for all machines released in the last couple of years have a
buggy backlight controller, and the kernel is striving to identify those broken
interfaces and disable them.

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