i915kms and Zenbook lcd brightness

[lukek]

SOLVED! It seems I was close, just needed to force brightness to 100% again after starting i915kms. Other possibly important parts are acpi_video and drm2 modules. So to some up my findings:-Load modules acpi_video acpi_asus acpi_asus_wmi drm2 i915kms-run "intel-backlight 100" 
I will post these to the forums as well so this mailing list won't be bothered anymore. Thanks. 

Sent from my Samsung Galaxy smartphone.-------- Original message --------From: Henry Hu <henry.hu.sh at gmail.com> Date: 2016-03-13  1:52 AM  (GMT-05:00) To: Luke <lukek at fastmail.fm> Cc: freebsd-x11 at freebsd.org Subject: Re: i915kms and Zenbook lcd brightness 


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