sony-vaio-z-series team mailing list archive

[Craig Blackie <craig@xxxxxxxxxxxxxxxxx>]

To the group:

I would like the als sensor to adjust my screen brightness
automatically, however this is not working for me.

I have checked and the value /sys/class/backlight/acpi_video0/brightness
is correct; Doing echo "3" >/sys/class/backlight/acpi_video0/brightness
as root changes the brightness.

The daemon activates the als and I can read the values in als_lux and
they are changing dependant on light.
Any ideas? I'm on:


Linux csb-laptop 3.8.8-2-ARCH #1 SMP PREEMPT Tue Apr 23 10:28:14 CEST 2013
x86_64 GNU/Linux

Regards,
Craig

On Thu, 2013-04-25 at 21:02 -0700, Brett Howard wrote:
> So I'd originally thought that the sony-acpid daemon simply wasn't
> pointed at the right location however I've now updated to ubuntu 13.04
> on my Vaio VPCZ12CGX.  I used the new kernel module that Mario
> provided the link to which compiled fine and after that I loaded up
> the daemon and all is working.
>
> I didn't like the fact that the brightness of the display was picked
> up by the ALS and the color of the window that I had open would then
> adjust the brightness of my display.  Anyway I changed the daemon
> source a bit so that the display brightness only does what the user
> asks of it.  I mainly use the daemon only to get my keyboard to do
> what I want.  I've included my modified version of the daemon as an
> attachment to this email.
>
>
> ~Brett
>
>
> On Tue, Apr 23, 2013 at 11:50 AM, Craig Blackie
> <craig@xxxxxxxxxxxxxxxxx> wrote:
>         So I compiled the module and sony-apcid. I can see all the als
>         values and it's working but the daemon doesn't change the
>         screen brightness.
>         Any ideas?
>
>         On 23 Apr 2013 15:32, "Mario Di Raimondo"
>         <mario.diraimondo@xxxxxxxxx> wrote:
>                 2013/4/23 Craig Blackie <craig@xxxxxxxxxxxxxxxxx>
>                         Why did you remove bumblebee?
>
>
>
>
>                 As I said I'm actually not interested in using nvidia
>                 card: I care only of battery autonomy.
>                 sony-laptop-zseries module can disable nvidia card
>                 using stamina_speed parameter (I should be possible
>                 even without using acpi_osi='' kernel parameter...).
>
>
>                 In the future, I'll test bumblebee but not now. I want
>                 to restore the low-power profile of my laptop.
>
>
>                 I've just discovered that the suggested changes in
>                 sony-acpid source code was necessary because (on my
>                 tests) I was using 'acpi_backlight=vendor' kernel
>                 parameter. Removing it the acpi backlight device
>                 appears and sony-acpid works out-of-the-box. I keept
>                 the change on the maxium brightness (static int const
>                 ACPI_MAX_BRGT = 8;), indeed the suggested maximum (15)
>                 is an invalid value on my box.
>
>
>                 Mario
>
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>





-- 
Craig S. Blackie