sony-vaio-z-series team mailing list archive

[Bernd Eggink <monoped@xxxxxxxxxx>]

Piernicola Oliva schrieb:

> The only thing that didn't work is the use of KDE4.1 applet to control 
> backlight (I tried also  xrandr --output LVDS --set BACKLIGHT_CONTROL 
> legacy )

Hm, I have the same machine, and

    xbacklight -set percent

works perfectly.

> However Eva's suggestion worked:
>
> sudo setpci -s 00:02.0 F4.B=00 ----> zero bright
>
> sudo setpci -s 00:02.0 F4.B=FF ----> max bright

Yes, but in this case the X server won't notice the change. So when the 
screen has been blanked due to timeout and then is shown again, the 
brightness will always be set to 100%.

> But in this way to use the applet and to automatically change  
> brightness in AC/battery modes. Why the backlight control via KDE applet 
> worked in 2.6.29 and not in 2.6.27 if sony-laptop module is the same?

Automatic brightness setting can easily be done via ACPI (ac_adapter event).

Regards,
Bernd

--
Bernd Eggink
http://sudrala.de