Re: what about the sony_acpi driver?

["Yu, Luming" <luming.yu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>]

On 2005.06.07 16:08:38 +0200, Bruno Ducrot wrote:
> On Tue, Jun 07, 2005 at 12:19:31AM +0800, Yu, Luming wrote:
> > On 2005.06.06 16:55:14 +0100, Matthew Garrett wrote:
> > > On Mon, 2005-06-06 at 23:28 +0800, Yu, Luming wrote:
> > > 
> > > > Believe me, generic-hotkey-driver and acpi-video-driver can handle these, if this is a acpi system.
> > > 
> > > A fairly large number of machines seem to have brightness control
> > > methods that aren't exposed via the acpi video device standard. Can
> > > these still be dealt with?
> > If they are ACPI system, I suppose they will rely on ASL method to handle video stuff. Then, I think generic-hotkey-driver can accommodate the quirks.
> > Please give me some example to prove I'm wrong. (The example should come from ACPI system.) 
> 
> On toshiba 3000 (and actually a lot of Compal laptops) LCD brightness is
> handled via a register in the EC space (sometimes the node is called BLVL,
> is at 0xb9, first 4 bits).
> 
> No ACPI methods (under, say, a video device) handle it, therefore it
> is necessary to read/write to it directly in order to control brightness
> as its done with the omke kernel module.

Thanks for this info. If there don't have AML-methods and GPEs related to hotkey features on a specific box, then
I think generic-hotkey-driver cannot help.

> 
> -- 
> Bruno Ducrot
> 


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