[PATCH v5 0/4] Fix Win8 backlight issue

[Josh Boyer]

On Fri, Oct 11, 2013 at 9:27 AM, Aaron Lu <aaron.lu at intel.com> wrote:
> v5:
> 1 Introduce video.use_native_backlight module parameter and set its
>   value to false by default as suggested by Rafael. For Win8 systems
>   which have broken ACPI video backlight control, the parameter can be
>   set to 1 in kernel cmdline to skip registering ACPI video's backlight
>   interface. Due to this change, the acpi_video_verify_backlight_support
>   is moved from video_detect.c to video.c - patch 3/4;

That's a fairly untenable position for distro kernels to be in.  They
now have to ask every user that reports an issue with the backlight to
try setting that option on the command line.  While I appreciate the
setting breaks things for some people, doesn't the Win8 issue impact
far more people?  Shouldn't it be defaulted to true?

If nothing else, can you add a config option for the default so
distros can use that to decide which way to default it and then work
on fixing the remaining users that have troubles?

josh