[Bug 82381] Dell latitude E5440 fails to turn back laptop display (eDP) backlight after DPMS off

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=82381

--- Comment #11 from Jani Nikula <jani.nikula at intel.com> ---
Any idea what causes the black screen?

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