[Bug 73156] Dual onboard LCD (eDP1 and DP1) cannot turn on DP1 (no backlight), no backlight control but can see screen in reflected light

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73156

--- Comment #10 from Chris Wilson <chris at chris-wilson.co.uk> ---
That rules out my plan for just wiring up a per-connector backlight. The next
assumption is that the backlight is controlled through ddc/di on the dp link.
Still leaves the question of how.

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