On Wed, Oct 11, 2006 at 08:59:04AM +0200, Arjan van de Ven wrote:
> it'd also be nice if the linux-ready firmware developer kit had a test
> for this, so that we can offer 1) a way to test this to the bios guys
> and 2) encourage adding/note the lack easily
Sure. Reading /proc/acpi/video/*/*/info should tell you whether a device
is an LCD or not. The brightness file should then contain a list of
available brightnesses, and writing one into there should change the
screen value. There's a patch somewhere that ports this to the
/sys/class/backlight infrastructure, but I don't think it's applied yet.
I'd write a test up for you, but I don't actually seem to have any
hardware that implements this properly. Tch.
--
Matthew Garrett | [email protected]
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