Backlight Control Inquiries

[nujinini]

Hello,

"xrandr --output LVDS --set BACKLIGHT_CONTROL native"

Works on my Fedora & Mint partition to let me control brightness on my laptop using Hotkeys. However, the same command does not work in Ubuntu giving me this error report instead:

jun@jun-laptop:~$ xrandr --output LVDS --set BCAKLIGHT_CONTROL native
X Error of failed request:  BadRROutput (invalid Output parameter)
  Major opcode of failed request:  149 (RANDR)
  Minor opcode of failed request:  15 (RRGetOutputProperty)
  Serial number of failed request:  26
  Current serial number in output stream:  26
jun@jun-laptop:~$

I have taken the liberty to post outputs of xrandr from Fedora and Ubuntu hoping that somebody might be able to help me decipher what's going on

Thanks so much!

Fedora 10
[jun@localhost ~]$ xrandr
Screen 0: minimum 320 x 200, current 1280 x 800, maximum 1280 x 1280
VGA disconnected (normal left inverted right x axis y axis)
LVDS connected 1280x800+0+0 (normal left inverted right x axis y axis) 303mm x 190mm
   1280x800       60.0*+
   1024x768       60.0  
   800x600        60.3  
   640x480        59.9

Ubuntu
jun@jun-laptop:~$ xrandr

Screen 0: minimum 320 x 200, current 1280 x 800, maximum 8192 x 8192

VGA1 disconnected (normal left inverted right x axis y axis)

LVDS1 connected 1280x800+0+0 (normal left inverted right x axis y axis) 303mm x 190mm

   1280x800       60.0*+

   1024x768       85.0     75.0     70.1     60.0  

   832x624        74.6  

   800x600        85.1     72.2     75.0     60.3     56.2  

   640x480        85.0     72.8     75.0     59.9  

   720x400        85.0  

   640x400        85.1  

   640x350        85.1  

DP1 disconnected (normal left inverted right x axis y axis)

Please feel free to comment if there are other outputs I need to post in order to get a clearer picture.