I just got somewhere with this mess. Did the following:
"cat /proc/acpi/video/GFX0/DD02/brightness" (Your brightness may be located in a different folder) and it outputted (despite my screen being blindingly bright) levels: 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 current: 0 So then I tried this "sudo echo 50 > /proc/acpi/video/GFX0/DD02/brightness" and got this output bash: /proc/acpi/video/GFX0/DD02/brightness: Permission denied So then I tried this "sudo su echo 50 > /proc/acpi/video/GFX0/DD02/brightness" And viola, my brightness level changed. So then I tried "echo 0 > /proc/acpi/video/GFX0/DD02/brightness" And presto, my screen went black. I don't know too much about what's going on, but it looks like whatever triggers the above referenced file, doesn't have proper permissions. Only true root can actually change the value of the file, not sudo. -- Screen brightness can not be adjusted in Lucid with Intel Arrandale graphics https://bugs.launchpad.net/bugs/573984 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
