[Bug 63671] HP 2000-2d11dx needs inverted backlight brightness

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=63671

Daniel Vetter <daniel at ffwll.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO
                 CC|                            |daniel at ffwll.ch

--- Comment #1 from Daniel Vetter <daniel at ffwll.ch> ---
Most likely not, the backlight inversion is only known to affect gen4 models
from Acer. You have a gen7 modell from HP.

Please boot with drm.debug=0xe on latest kernels but without any other options
and then attach the full dmesg to this report.

Also please try out whether any of the backlight interfaces in
/sys/class/backlight work or whether the backlight adjustment keys work.

The background is that on some recent machines something (which we haven't
tracked down yet) resets the backlight to 0 when booting. Inverting the scale
doesn't fix this at all (and actually breaks your backlight pretty badly
overall).

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