[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 #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
Could you please recompile the ddx --enable-debug=full and attach the me the
Xorg.0.log, and also capture the dmesg with drm.debug=6.

Odd, 3.16 should have bl_power (or so I think). Could you also please ls -R
/sys/class/backlight/

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