[Bug 19168] xset dpms force off does not turn off LCD backlight

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=19168





--- Comment #5 from Alex Deucher <agd5f at yahoo.com>  2008-12-19 07:51:13 PST ---
Created an attachment (id=21325)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=21325)
possible fix

This implements the on chip backlight control, not all oems use it.  It might
work for you, it might not.  Also, depending on how the backlight is wired up,
the levels may be reversed (not sure whether 0 = on or off and 255 = on or
off).
if it doesn't work, try switching the levels in the patch.  I've got the
alternate setting commented out below the main one, so just switch the
comments.  Make sure you switch both the enable and disable paths.


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