http://bugzilla.kernel.org/show_bug.cgi?id=9995





------- Comment #40 from [EMAIL PROTECTED]  2008-03-19 09:34 -------
(In reply to comment #32)
> Current versions of X.org **enforces** this.  It tells the BIOS to stop
> controlling the backlight levels, in a much lower level than even the ACPI
> interface.

Hmm? at least with xf86-video-intel-2.2.1, if a kernel backlight control is
detected (ACPI video or thinkpad_acpi both I think, but I've only tested it
with ACPI video), it disables the native interface and just makes calls to the
kernel interface. I don't know whether it still does any nasty low-level stuff
even in this mode, tho.
This can be changed at runtime to use the native interface, and it uses it by
default if no kernel interface was found, of course.


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