[hal-info] Some thinkpad panels don't use laptop_panel.brightness_in_hardware

[Matthew Garrett]

On Fri, Oct 24, 2008 at 11:17:28AM +0100, Matthew Garrett wrote:
> On Fri, Oct 24, 2008 at 11:16:34AM +0200, Danny Kukawka wrote:
> > But this would mean we need to add laptop_panel.brightness_in_hardware=true 
> > again if the kernel handles it (from the userspace view it doesn't matter if 
> > the kernel or the hardware do the change, since a reaction from userspace 
> > would lead to trouble if the brightness was already changed.).
> > 
> > Is there a way to find out (e.g. via sysfs) if the kernel handles the change?
> 
> If there's an ACPI backlight and 
> /sys/module/video/parameters/brightness_switch_enabled is Y.

Oh, to clarify - this'll be true for basically all hardware that has an 
ACPI video backlight control.

-- 
Matthew Garrett | mjg59 at srcf.ucam.org