xbacklight says "No outputs have backlight property"

[Yuri]

OS is FreeBSD, all installed from ports.

Laptop is Lenovo 320.

The Radeon driver is configured with:

Section "Device"
         Identifier "Card0"
         Driver "scfb"
         BusID "pci0:0:1:0"
EndSection

This is the only text that the xorg configuration has.


Backlight feature is certainly supported by the hardware, because there 
are corresponding Fn-Fxx keys that work in Windows.


Yuri


---------------------

$ xrandr --verbose
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1366 x 768, current 1366 x 768, maximum 1366 x 768
default connected 1366x768+0+0 (0x2e2) normal (normal) 0mm x 0mm
     Identifier: 0x2e1
     Timestamp:  26640
     Subpixel:   unknown
     Clones:
     CRTC:       0
     CRTCs:      0
     Transform:  1.000000 0.000000 0.000000
                 0.000000 1.000000 0.000000
                 0.000000 0.000000 1.000000
                filter:
   1366x768 (0x2e2)  0.000MHz *current
         h: width  1366 start    0 end    0 total 1366 skew    0 clock   
0.00KHz
         v: height  768 start    0 end    0 total  768 clock   0.00Hz
[xx at xx ~]$ xbacklight -dec 10
No outputs have backlight property