[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 #26 from Daiver <daiver at daiver.ru> ---
Yes.
I turn on external display backlight trough BIOS.
Then boot compiled kernel.
External still not under control.

Neither the reduced brightness, neither increasing nor setting the brightness
to 0, do not display off, no impact on the outside, only on the inside.

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