Packard Bell EasyNote LV need i915.invert_brightness=1

[Petter Reinholdtsen]

[Daniel Vetter]
> acpi_backlight=vendor should disable the acpi backlights (you can
> check that in /sys/class/backlight), which would mean that userspace
> should fall back to intel backlight driver. Can you please check
> whether that one works even without the invert_brightness knob? I.e.
> not just whether you'll end up with a black screen, but whether
> adjusting the backlight also works correctly.

Adjusting backlight using the laptop keys for this work in KDE when I
boot with acpi_backlight=vendor and without invert_brightness=1.  I am
not sure if the buttons work the right way, though (never seen which
should increase or decrease the brighness), so it might be inverted.

Is it possible to tell acpi_backlight to invert the brighness setting?
Would it affect i915 too?

-- 
Happy hacking
Petter Reinholdtsen