Maybe this fix from Dov-El works for you as well? It worked for me, but I am not on Kde:
"The fix is found @ http://www.ubuntu1501.com/2008/04/overview-of- ubuntu-804-hardy-heron-on.html . and was blogged by aaronmt (http://www.blogger.com/profile/00032734089773880467). <quote> To fix brightness, it's easy as just editing two script files. No bios change whatsoever. sudo gedit /etc/acpi/video_brightnessup.sh replace everything in the file with #!/bin/bash CURRENT=$(grep "current:" /proc/acpi/video/VGA/LCD/brightness |awk '{print $2}') case "$CURRENT" in 100) echo -n 100 > /proc/acpi/video/VGA/LCD/brightness; ;; 87) echo -n 100 > /proc/acpi/video/VGA/LCD/brightness; ;; 75) echo -n 87 > /proc/acpi/video/VGA/LCD/brightness; ;; 62) echo -n 75 > /proc/acpi/video/VGA/LCD/brightness; ;; 50) echo -n 62 > /proc/acpi/video/VGA/LCD/brightness; ;; 37) echo -n 50 > /proc/acpi/video/VGA/LCD/brightness; ;; 25) echo -n 37 > /proc/acpi/video/VGA/LCD/brightness; ;; 12) echo -n 25 > /proc/acpi/video/VGA/LCD/brightness; ;; *) echo -n 100 > /proc/acpi/video/VGA/LCD/brightness ; ;; esac sudo gedit /etc/acpi/video_brightnessdown.sh replace everything in the file with #!/bin/bash CURRENT=$(grep "current:" /proc/acpi/video/VGA/LCD/brightness |awk '{print $2}') case "$CURRENT" in 12) echo -n 12 > /proc/acpi/video/VGA/LCD/brightness; ;; 25) echo -n 12 > /proc/acpi/video/VGA/LCD/brightness; ;; 37) echo -n 25 > /proc/acpi/video/VGA/LCD/brightness; ;; 50) echo -n 37 > /proc/acpi/video/VGA/LCD/brightness; ;; 62) echo -n 50 > /proc/acpi/video/VGA/LCD/brightness; ;; 75) echo -n 62 > /proc/acpi/video/VGA/LCD/brightness; ;; 87) echo -n 75 > /proc/acpi/video/VGA/LCD/brightness; ;; 100) echo -n 87 > /proc/acpi/video/VGA/LCD/brightness; ;; *) echo -n 50 > /proc/acpi/video/VGA/LCD/brightness ; ;; esac </quote>" -- Brightness key stopped working after update [Gutsy] https://bugs.launchpad.net/bugs/145337 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs