i915.invert_brightness

[Gedalya]

On an HP dm4t-1200 laptop
00:02.0 VGA compatible controller [0300]: Intel Corporation Core
Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if
00 [VGA controller])
	Subsystem: Hewlett-Packard Company Device [103c:146a]

Running Linux version 3.5.0-rc7+
Boots up with backlight turned off, invert_brightness helps
However this remains "inverted" indeed, turning the brightness down
using the fn key brings the brightness up, even though the on-screen
indicator in GNOME shows it going down, and vice versa.
Without invert_brightness I can just turn the brightness up in the right
direction so to speak.