Re: [gpm] hal/gnome-power-manager brightness control

["Alec Burney" <alec burney gmail com>]

that's great news. i don't mind recompiling when the time comes, but
in the meantime, i took a look at the fdi files, and it seems like
they just point hal at the right scripts to execute, right? as i
mentioned before, i tried making the brightness scripts execute the
correct operations, but g-p-m still doesn't control brightness. i'm
guessing the g-p-m doesn't even try because lshal doesn't see the lcd.
is there a way i can force hal to register a panel so that g-p-m will
know that it should control brightness?
i'm not sure if i have the right idea here - i don't know how hal or
g-p-m work, really. if you could point me to some relevant
documentation, i'd gladly stop wasting your time.

On 11/27/06, Richard Hughes <hughsient gmail com> wrote:
> On Mon, 2006-11-27 at 23:35 -1000, Alec Burney wrote:
> > gnome-power-manager brightness options are missing here on my laptop.
> > hal doesn't detect my panel. i can control it via software using the
> > file
> >  /proc/acpi/video/GFX0/LCD
> > the format of the file is like this;
> >
> > levels:  8 4 1 2 3 4 5 6 7 8
> > current: 4
> >
> > the numbers on the first line is the available levels. not sure why
> > there is redundancy there.
>
> On AC, On Battery, Supported states. The first two are normally ignored
> by the BIOS.
>
> > the second line is the current brightness, not surprisingly.
> > echoing (into that file) a simple number between 1 and 8, inclusive,
> > will change the brightness.
> > i tried sticking support for this into the hal brightness scripts
> > in /usr/share/hal, by removing the checks and simply preforming the
> > necessary actions, but g-p-m didn't seem to pick up on it, so i guess
> > i did it wrong.
>
> Well, HAL needs to have the laptop_panel capability added - you can do
> this manually for now if you want in an fdi file - but all this will
> work soon... see below.
>
> > attached is my lshal. i'd love to see support for this in g-p-m/hal.
> > anyway, thanks for your time.
>
> Well, backlight support is very quickly being added to the kernel, and I
> think acpi video support is recently merged, or very close. HAL support
> for the backlight class is also very close, so in a few weeks, this
> should "just work" for you. Well, assuming you install a new kernel and
> HAL.
>
> Hope that helps,
>
> Richard.