sony-vaio-z-series team mailing list archive

[Flavio <fbcyborg@xxxxxxxxx>]

Thanks for replying,

On 22 February 2012 21:23, Joël Bourquard <joel.bourquard@xxxxxxxxx> wrote:
> Just a naive question, just in case: are you sure you're in "Stamina" mode?
> The brightness cannot be controlled while in nvidia mode at the moment.
Thanks a lot Joël,
I have only one Graphic card on my Z2:
00:02.0 VGA compatible controller: Intel Corporation Device 0126 (rev 09)
So, no nvidia here, there's only one mode: stamina.
I know what you are talking about, since I also own an old Sony Laptop (SZ330P)
which has two video cards: nvidia and intel, speed and stamina respectively.
In this case I think there should not be confusion, since my Z2 doesn't allow
the speed mode.

On 22 February 2012 21:22, vick <weasalandme@xxxxxxxxx> wrote:
> There is a sony-laptop module that already comes with the kernel so you need to either restart or do modprobe -r sony-laptop and then modprobe sony-laptop
> When you do that  you can check the dmesg output and see if module tells you anything about the brightness control.
> And finally, make sure you don't have something like acpi_backlight=vendor as a boot option because I think that might mess with it.
Thank you Vick,
I know there is the sony-laptop module in the kernel, but since I have
these problems,
I searched a lot on Internet until I've found the sony-laptop-zseries
module on launchpad. So I decided to use it, instead
of the one in the kernel. As a matter of fact, I didn't notice any
difference using one instead of the other.
In any case, I am not able to increase/decrease the screen brightness.
I also did rmmod/modprobe sony-laptop (enabling/disabling the debug
mode, and other options), but nothing.
What the log says, is always the same boring message:

sony-laptop: brightness ignored, must be controlled by ACPI video driver

As regard the boot options: no problem. I don't have nothing about acpi_*.

Thank you so much,

best regards,

-- 
Flavio