[Bug 84013] [IVB] backlight control stops working on screen off/VT-switch

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84013

--- Comment #7 from Chris Wilson <chris at chris-wilson.co.uk> ---
So during that run, the backlight was externally cycled (i.e. not using X) from
max to zero to max brightness again, then the output turned off/on. There was
not a VT switch though.

What was the sequence of events you performed and the behaviour you observed?

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