[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 #10 from Chris Wilson <chris at chris-wilson.co.uk> ---
Odd, since you should not have bl_power. At any rate, could you try with

commit 7ecc778691c452285f754743a93a46fa1d3da52f
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Tue Nov 4 10:36:26 2014 +0000

    backlight: bl_power uses 0 for on and 4 for off

    The backlight/bl_power file didn't obey the obvious semantics, but
    instead operates using some interesting framebuffer API. Oh well.

    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

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