Still doesn't work in Saucy. For me, none of the following, cause any change in screen appearance, nor to they bring any response in lxterminal other than a new prompt:
xbacklight -get xbacklight -set 100 -time 0 xbacklight -set 20 -time 0 xbacklight -set 2 -time 0 Running Saucy in plain openbox, no lxde other than lxterminal. Also, as an aside, I think #4 may be misleading in saying "The xrandr program also works fine." These commands work fine: [code] # Sets the "brightness" (i.e., thev transparency) of the LCD layer very dark: xrandr --output VGA-0 --brightness 0.1 # Legitimate values are 0 to 1 # Sets the "brightness" (i.e., thev transparency) of the LCD layer all the way up: xrandr --output VGA-0 --brightness 1 [/code] but, unless I've misunderstood man xrandr they DO NOT affect the actual brightness of the backlight. In a well lit room, the effect looks very similar, but in a dark room the difference should be apparent. It may be I haven't figured out the syntax correctly, but for me in Saucy, none of these do anything: [code] xrandr --output VGA-0 --set backlight 50 xrandr --output LVDS-0 --set backlight 50 xrandr --output --auto --set backlight 50 xrandr --output auto --set backlight 50 [/code] -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1054298 Title: xbacklight doesn't work, but xrandr does and so does /sys/class/backlight Status in “linux” package in Ubuntu: Expired Bug description: Sony Vaio P Ubuntu Precise and Quantal kernel 3.5.0 gma500_gfx kernel driver modesetting xorg driver Assume the current quantal & quantal-proposed versions of everything. xbacklight doesn't work. No backlight change, and no output from the program. "xbacklight" and "xbacklight -get" show nothing, no output from the program at all. "xbacklight -set50" and "xbacklight-d :0 -set 50" does nothing nor prints any output. However both sysfs and xrandr work fine. Specifically: xrandr --verbose lists outputs and shows the main screen has backlight property, and "xrandr --output LVDS-0 --set backlight 50" changes the backlight brightness. And "cat /sys/class/backlight/psb-bl/actual_brightness" shows the current brightness, and "echo 50 >/sys/class/backlight/psb-bl/brightness" changes the brightness. I have written the following script to use in place of xbacklight: http://forums.bodhilinux.com/index.php?/topic/5985-brightness-scripts/page__view__findpost__p__56911 This script, both the sysfs and xrandr methods of it, works fine for me on the same machine. (for sysfs, I had to make a udev rule to allow users to write to the sysfs files, as noted on that page and in the --help output of the script) It requires zenity for the user interactive options. Not needed for the non-interactive options. -- bkw To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1054298/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp