LCD brightness capability question

[David Zeuthen]

On Tue, 2006-04-18 at 19:10 +0200, Danny Kukawka wrote:
> On Tuesday 18 April 2006 16:54, David Zeuthen wrote:
> > On Tue, 2006-04-18 at 10:50 -0400, David Zeuthen wrote:
> > > If "<not supported>" is returned do we have evidence that it always
> >
> > s/is returned/is not returned/
> >
> > > works? If this is not the case we need a white list (e.g. need fdi
> > > files).
> 
> No, we have not. 

Fine, we'll do a white list via device information files then. Is that
OK with you?

> And it is also mandatory to check for <not supported> because 
> some older kernel versions oops if you echo to brightness if it is not 
> supported (IIRC fixed in 2.6.16/17).

Certainly, if we see '<not supported>' in hald/linux2/acpi.c we simply
don't add the laptop_panel hal device object.

    David