Update - # ls /sys/class/backlight has three listings acpi_video0 acpi_video1 intel_backlight
# cat /sys/class/backlight/intel_backlight/max_brightness 976 # echo 100 > /sys/class/backlight/intel_backlight/brightness bash: /sys/class/backlight/intel_backlight/brightness: Permission denied # sudo -s root# echo 100 > /sys/class/backlight/intel_backlight/brightness This last command worked and my brightness was changed successfully. I tried other values too, and they all seem to work. I didn't try going beyond the max_brightness value, of course. Is there something else I could try that would help in narrowing down and / or fixing this bug? -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1207487 Title: Brightness Controls work but brightness doesnt change To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1207487/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp