I have the same problem with a Lenovo Ideapad Y530. Looking at ACPI, /etc/acpi/events/video_brightnessup and /etc/acpi/events/video_brightnessdown are matched, and the appropriate scripts are called. Even replacing these scripts with "exit" you have the same behavior. So it seems the hardware(?) or the xserver(?) is actually trying to control the brightness.
On this computer, /proc/acpi/video/VGA/LCDD/brightness shows: levels: 90 80 69 59 49 40 35 27 20 9 1 current: 59 Testing, only those exact values work for the brightness, and they do work fine from the /proc interface. Some folks resolve this by setting 4 and 5 to /proc/acpi/ibm/cmos upon brightnessup and down, respectively. However, /proc/acpi/ibm doesn't exist, and thinkpad_acpi won't load on an Ideapad. For those using a Lenovo Thinkpad, see this: http://vntutor.blogspot.com/2007/12/brightness-buttons-in-lenovo-thinkpad.html ** Changed in: gnome-power-manager (Ubuntu) Status: Invalid => New -- hardware brightness keys on lenovo R60e are working "strange" in gnome https://bugs.launchpad.net/bugs/90925 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
