Hi all, I have an Asus K55VD, running Ubuntu 13.04 (gnome shell version) and had the same issue with controling brightness using hotkeys.
The only working workaround is to add "acpi_osi=" next to the default grub line in /etc/default/grub. In this case, under /sys/class i see: /sys/class/backlight/intel_backlight Using echo n > brightness can manage screen brightness with success. An other workaround almost works: https://help.ubuntu.com/community/AsusZenbookPrime#Ubuntu_13.04 Using: GRUB_CMDLINE_LINUX_DEFAULT="splash quiet acpi_osi='!Windows 2012'" At session startup, the screen in middle brightness. Using hotkeys works with Ubuntu notification working, but every hotkeys press required a few seconds to work, if you want to go from minimum to maximum a very very long time would be required... So not usable, still the best workaround is using "acpi_osi=" I have also tried various settings like: acpi_osi=Linux acpi_backlight=vendor acpi_osi=Linux acpi_backlight=legacy For both cased, hotkeys does not work, i have tried using a custom script in /etc/acpi with associated events (got them using acpi_listen) but did not worked. Using "=acpi_osi" works good, but what could explain that the gnome daemon does not recognize hotkeys when pressed ? Thanks for any help. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1100825 Title: Brightness Hotkeys FN (F5,F6) not working in Asus K55VD (A55VD-SX406H) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1100825/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
