[Bug 70406] Can't turn on laptop screen without changing its resolution first

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70406

--- Comment #21 from Chris Wilson <chris at chris-wilson.co.uk> ---
The issue with interpreting 0 as off in the ddx is that it is only definitely
true for intel_backlight. For an ACPI backlight, 0 means the low brightness as
defined by the firmware which may be a valid setting that the user requests. My
only suggestion is to shout at whatever userspace is setting the backlight to 0
after turning off the display and asking them whether they are serious?

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