Which Lenovo Laptop?

文鳥 bunchou at googlemail.com
Fri Dec 9 19:21:26 UTC 2011

On Fri, 9 Dec 2011 19:05:26 +0100
Polytropon <freebsd at edvax.de> wrote:

> On Fri, 9 Dec 2011 16:50:23 +0100, ��井 Pierre wrote:
> > If there is a setting to xorg.conf that does work for setting the
> > screen brightness, please tell me. Everything I tried so far turned
> > out negative, but maybe there's something I overlooked. 
> Don't "modern" laptops come with keys (or key combinations,
> usually Fn + Cursor or Fn + PF key) to adjust brightness
> and contrast, or has this lowest-level functionality
> finally moved into the world of software, i. e. drivers?

At first I thought so too, but apparently you need the right drivers to
get some of the keys to work: Now I am finally able to control the
brightness by pressing Fn + Home/End, but only thanks to the
co-operation of the acpi_video & acpi_ibm modules and the nvidia
driver (which needs the "RegistryDwords" "EnableBrightnessControl=1"
option in xorg.conf).

And just to make things more complicated: the keyboard light and mixer
mute keys seem to still be hard-wired and thus do not need driver

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