Re: [PATCH 1/3] ACPI: Provide config option to disable BIOSbrightness changes on power events

[Matthew Garrett]

On Fri, Feb 17, 2012 at 08:27:04PM +0100, Pavel Machek wrote:
> Hi!
> 
> > The default ACPI behaviour is to instruct the BIOS to automatically change
> > brightness on power events. This may be undesirable for distributions who
> > manage brightness in userspace. Provide a config option that disables this
> > behaviour and leaves brightness control up to the OS.
> 
> Should this be configured during runtime?
> 
> Like... when userspace power management starts, it disables this?

This is ACPI-specific. It's not emulated by any of the other backlight 
drivers. There's no terribly easy way to have generic userspace handle 
it.

-- 
Matthew Garrett | mjg59@xxxxxxxxxxxxx
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/