Debugging Backlight questions

[Brian Murray]

On Tue, Mar 01, 2011 at 09:32:56AM +0100, Stefan Bader wrote:
> On 03/01/2011 12:15 AM, Brian Murray wrote:
> > I was reviewing https://wiki.ubuntu.com/Kernel/Debugging/Backlight and
> > had a couple of questions.
> > 
> > 1) In the first bullet point it says - "This normally is not a problem
> > in Linux."  Does this mean linux the kernel or something else?
> > Additionally what course of action does the user in this situation take?
> > 
> It probably should say "there is nothing that the kernel could do about".
> Basically, if the brightness adjustment is handled by the HW and there is no
> ACPI or input event generated, then how should it generate OSD notifications?
> I do not think a user can do much about that, than to accept that there is no
> OSD feedback. Maybe there are way, but to find anything will require deep
> knowledge about the system and HW.
> 
> > 2) Which systems does the thinkpad-acpi.brightness_enable option apply
> > to?  I'd assume all Thinkpads but you never know.
> >
> All systems that automatically load the thinkpad-acpi module (which is basically
> all ThinkPads but maybe a few Lenovo branded laptops, too).

This page has also been updated.

-- 
Brian Murray
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