On 29-07-15 17:17, Ranjan Maitra wrote:
> Oops. The revert-revert patch was never actually dropped so long ago.
> So we're still defaulting the ACPI brightness_switch_enabled parameter
> off by default in Fedora.
> If you still believe we should drop it, I can do so with the 4.2
> kernels. Hopefully we've had enough time upstream to shake out any
> issues. I'd like confirmation before I do that though.
Just to be clear, because I am hopelessly confused, what will the dropping do. Have the
ACPI brightness_switch_enabled parameter enabled by default? If so, I would like that.
Yes dropping the Fedora specific cause will make it enabled by default,
relying on it is not a good idea though, as newer laptops use
a different backlight driver which does not do this, responding
to brightness keypresses should really be done by userspace.
If you rely on the brightness_switch_enabled=yes behavior, your
workflow will likely break when you replace your laptop.