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Old 12-05-2008, 02:20 PM
Josselin Mouette
 
Default Bug#506644: Bug#506644: gnome-power-manager: Brightness applet does not change brightness

reassign 506644 linux-2.6
thanks

Le vendredi 05 décembre 2008 à 15:06 +0000, Sjoerd Simons a écrit :
> Check if you hav e a class backlight device in /sys (iotw something under
> /sys/class/backlight). If so you should be able to control the backlight via
> hal. You can test the kernel by echoing values into the brightness file

Indeed, the kernel support seems broken. I can change the values
in /sys/class/backlight/acpi_video0/brightness but they have no impact
on the brightness.

Charles, setting "xrandr --output LVDS --set BACKLIGHT_CONTROL native"
should make at least xbacklight work, but for HAL which relies on the
ACPI interface, this is up to the kernel.

Thanks to all for the help,
--
.'`.
: :' : We are debian.org. Lower your prices, surrender your code.
`. `' We will add your hardware and software distinctiveness to
`- our own. Resistance is futile.
 
Old 12-06-2008, 02:01 AM
Charles Plessy
 
Default Bug#506644: Bug#506644: gnome-power-manager: Brightness applet does not change brightness

Le Fri, Dec 05, 2008 at 04:20:07PM +0100, Josselin Mouette a écrit :
> Indeed, the kernel support seems broken. I can change the values
> in /sys/class/backlight/acpi_video0/brightness but they have no impact
> on the brightness.
>
> Charles, setting "xrandr --output LVDS --set BACKLIGHT_CONTROL native"
> should make at least xbacklight work, but for HAL which relies on the
> ACPI interface, this is up to the kernel.

Thanks a lot everybody for your help.

Interestingly, on my machine both methods work.

Have a nice day,

--
Charles Plessy
Tsurumi, Kanagawa, Japan


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