[Bug 111202] [Regression]: intel_backlight fails to change eDP1 brightness on Dell Precision 5540 (Coffeelake)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111202

--- Comment #3 from Arcadiy Ivanov <arcadiy at ivanov.biz> ---
> [    6.495549] [drm:intel_dp_aux_enable_backlight [i915]] VBT defined backlight frequency 200 Hz
> [    6.496173] [drm:intel_dp_aux_enable_backlight [i915]] VBT defined backlight frequency out of range

Could the "out of range" be the culprit? I would think that a thing like that
should not be a debug log message but rather an error/warning.

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