accessibilities first tests - many questions

[Albert Cahalan]

Guylhem Aznar writes:
> On 8/18/07, Jordan Crouse <jordan.crouse at amd.com> wrote:

>> We didn't enable this ability in the sysfs/ interface.  I have
>> never been too clear on what the actual practical uses are for
>> something like this, so the control never got added.
...
> It's just an experiment - I would like to have data proving users
> actually prefer using the display when the algorithm is enabled.

I wrote a patch to provide the functionality. Here you go:
http://lists.laptop.org/pipermail/devel/2007-March/004287.html

It'd be great if this could be included. Better yet would be
to allow specifying the raw register value, of course with
an -EINVAL if bits unrelated to swizzle and backlight are set.

In another email you mentioned using test images. I made one
that seems to do a nice job. Note that you mustn't view a
scaled version, as that messes up the measurement. The web
browser scales images by default now, so don't use that.
The "xli" program works OK.

http://wiki.laptop.org/go/Image:Zone_plate_boys.png