I have an Asus N56VJ that exhibited the same behavior on 12.10. I installed kernel 3.7.0-7 from Xorg-edgers and the F5-F6 backlight keys now work correctly. I consider the backlight adjustment to be critical as in a dimly lit room, the screen is so bright it hurts your eyes.
I tried a 13.04 live distro from one of the magazine DVDs. Activating the backlight keys showed the previous incorrect behaviour as described in this bug. The Bios on this N56VJ is verion 203 and that is the only one shown on the Asus web site. I asked Asus support if there was a 214 update for this model and they said no. So I will not be doing 13.04. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1165590 Title: Unable to adjust backlight brightness after upgrade to raring - Asus UX32VD Status in “gnome-settings-daemon” package in Ubuntu: Confirmed Bug description: Hi, After upgrading to raring, gsd-backlight-helper seems to make a wrong decision on which backlight to modify/the correct node is missing. The hotkeys for changing the screen brightness don't work on Asus UX32VD. The brightness is stuck between two values with the hotkeys (about 95% and 90%) gsd-backlight-helper sets /sys/devices/virtual/backlight/apple_backlight/brightness which doesn't change anything : # strace -e write,open /usr/lib/gnome-settings-daemon/gsd-backlight-helper --set-brightness 10 2>&1|tail -n 2 open("/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/backlight/acpi_video0/brightness", O_WRONLY) = 3 write(3, "10", 2) = 2 manually setting the brightness like this doesn't work : # echo 5 > /sys/devices/pci0000\:00/0000\:00\:01.0/0000\:01\:00.0/backlight/acpi_video0/brightness setting the brightness using intel_backlight works well : # strace -e write,open /usr/bin/intel_backlight 100 2>&1|tail -n 4 open("/sys/bus/pci/devices/0000:00:02.0/resource0", O_RDWR|O_CLOEXEC) = 4 write(1, "current backlight value: 100%\nse"..., 52current backlight value: 100% set backlight to 100% ) = 52 manually setting the brightness like this works : # echo 50 > /sys/bus/pci/devices/0000\:00\:02.0/backlight/acpi_video1/brightness ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: gnome-settings-daemon 3.6.4-0ubuntu8 ProcVersionSignature: Ubuntu 3.8.0-16.26-generic 3.8.5 Uname: Linux 3.8.0-16-generic x86_64 ApportVersion: 2.9.2-0ubuntu5 Architecture: amd64 Date: Sun Apr 7 07:41:38 2013 InstallationDate: Installed on 2012-09-17 (201 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64+mac (20120917) MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: gnome-settings-daemon UpgradeStatus: Upgraded to raring on 2013-04-06 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1165590/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
