[arch-general] [solved] Re: xbacklight broken in 3.13

[Michael Hauser]

On 2/21/14, Michael Hauser <awarewater at gmail.com> wrote:
> Hi,
>
> after update to kernel 3.13, xbacklight fails to adjust the brightness
> on my Asus EeePc 1015 PX; anyone in the same boat?
>
> echoing a number into:
>
> /sys/devices/pci0000:00/0000:00:02.0/backlight/acpi_video0/brightness
>
> updates the value as expected, only it doesn't really do anything.
>
> Fell back to using the pci method (as described in the wiki) to reduce
> the glare for the time being.
>
>
> Regards, mih
>
> --
> 'aware water' is an anagram for 'we are at war'
>

Hi, just wanted to let you know, adding the line:

Option      "Backlight"  "intel_backlight"

in:

/etc/X11/xorg.conf.d/20-intel.conf

has restored the functionality;  albeit with an interesting twist:
setting the backlight value to 0 now turns the backlight off.

cheers, mih