Re: [gpm] Display Brightness Control on Compaq Presario F700 / HP6000
- From: "Richard Hughes" <hughsient gmail com>
- To: royconejo <royconejo gmail com>
- Cc: gnome-power-manager-list gnome org
- Subject: Re: [gpm] Display Brightness Control on Compaq Presario F700 / HP6000
- Date: Sat, 22 Mar 2008 16:10:30 +0000
On Sat, Mar 22, 2008 at 9:58 AM, royconejo <royconejo gmail com> wrote:
> well in the meantime I found "omnibook", a kernel module which
> supports *some* models of HP/Compaq.. bur it does not support G6000 or
> F700..
Onmibook is an out of tree driver and might get some laptops working.
> my real question was: where do gnome power managment / brightness
> applet looks for backlight dimming support?
It uses HAL, and so uses HAL to be abstract. Hal uses /proc/acpi and
/sys/class/backlight/ devices to change the backlight.
> and.. there is no standard way to control a backlight with standard
> ACPI calls?? (I dont know a thing about ACPI, I'm just asking because
> it seems there is a standard way to control AC/Battery power, etc)
There is, but most OEM's ignore it. See http://mjg59.livejournal.com/2006/02/07/
Richard.
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