sony-vaio-z-series team mailing list archive

[David Aveiro <daveiro@xxxxxxxxxxx>]

Hi Joel,

while using nvidia official drivers I would change brightness in two ways:

1) execute in shell as root:

nvidia-settings --assign Brightness=X

where X is a value between -1 (lowest brightness) and 1 (very very high 
brightness, useful if in direct sun, otherwise 0 is quite OK).
2) execute the graphical interface:

nvidia-settings

the nvidia configuration tool opens where, among other things like 
configuring other displays, twinview, etc., you can manually change a 
slider that selects a certain screen brightness.
To lower power consumption you may also try the tips here where most 
should apply to Gentoo:
http://docs.fedoraproject.org/en-US/Fedora/14/html/Power_Management_Guide/Example_Laptop.html

Kind regards
David

On 11/18/2010 10:17 AM, Joël Bourquard wrote:
> Hi all,
>
> I have a new VPCZ13AFJ and got pretty much everything to work:  
> fakeraid, keyboard, trackpad, graphics and sound.
> My BIOS is patched, switching is set to static in the advanced menu 
> and the switch is set to Speed.
> Now just one thing is killing me: *how to lower the backlight power on 
> this machine ?*
> I tried the script which created "sony-nvidia-brightness-down" and 
> "sony-nvidia-brightness-up" in my /etc/acpi/events/.  Well that's 
> good, except that these script call "nvclock -S -5" which does *not* 
> work on my system !
> When I run "nvclock -S -5" I get:
>
> Unhandled init script entry with id '' at 6fab
> (....)
> Unhandled init script entry with id '' at 02d4
> Error!
> Smartdimmer is only supported on certain (HP/Samsung/Sony/Zepto) 
> laptops using a Geforce 6200/7x00Go/8x00Go. If you want support on 
> your laptop contact the author.
> My version of nvclock is:   sys-power/nvclock-9999   which is the CVS 
> version !
> I tried writing to /proc/acpi/video/DGPU/LCD/brightness but I get 
> "Invalid argument".
> I tried writing to /sys/devices/virtual/backlight/sony/brightness 
> which has no visible effect. Brightness is still at maximum.
> I tried to compile and "make install" the 
> "sony-laptop-zseries-0.9np7.tar.gz", then put "options sony-laptop 
> speed_stamina=3" into /etc/modprobe.d/sony-laptop.conf and rebooted.  
> No visible improvement either.
> Any insight would be *very* welcome !
>
> Thanks,
>
> Joël
>
>
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