i915kms and Zenbook lcd brightness

[Henry Hu]

On Sat, Mar 12, 2016 at 7:12 PM, Luke <lukek at fastmail.fm> wrote:

> I downed the current today and built GENERIC kernel hoping to get my
> Asus Zenbook UX31A to work with Xorg (kms) as I see the recent i915kms
> work was submitted last week (many thanks to the developers hard work).
> However, when X starts it is VERY dim (brightness level 0?) even though
> I have loaded the "acpi_asus", "acpi_asus_wmi" and sysctl reports
> brightness at "100".
> About a month ago I had downed the development branch of this work
> (before it was submitted to head) and compiled it and had success using
> the above mentioned modules I believe. But it no longer works for me.
> Has anyone else noticed this? Have I forgotten a crucial step or is
> there a regression in the code or something else at foot here?
> Any insight where to look next would be appreciated.
>

I think that this has been posted before on the mail list, and I also
suffer from this.
On the other hand, setting hw.acpi.video.lcd0.brightness to some value > 0
does light up the screen.
So I have a startup script to set this when starting the session.
My machine is a Zenbook UX51VZ with Intel HD Graphics 4000.


> Thanks for your time.
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-- 
Cheers,
Henry