Here is this bug reported upstream by me: https://bugzilla.kernel.org/show_bug.cgi?id=92391 It was closed as duplicate with a reference to this one: https://bugs.freedesktop.org/show_bug.cgi?id=81762
It is not a problem with device initialization, it is rather a problem with device driver not initializing some fields in device op.region with a values expected by ACPI code. There was an experimental kernel branch which is expected to fix this bug but I'm not certain what is current status on this. Looks like there is next to none activity in DRM/Intel bugzilla report #81762 so chances seem to be low that we would get a proper fix anytime soon. ** Bug watch added: Linux Kernel Bug Tracker #92391 http://bugzilla.kernel.org/show_bug.cgi?id=92391 ** Bug watch added: freedesktop.org Bugzilla #81762 https://bugs.freedesktop.org/show_bug.cgi?id=81762 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1348890 Title: Asus UX32LN: Brightness keys Fn+F5 and Fn+F6 don't generate evdev event Status in linux package in Ubuntu: Confirmed Bug description: Hello Community, It seems brightness keys don't work with latest Ubuntu 14.04 LTS for laptop Asus Zenbook UX32LN. sudo dmidecode -s bios-version UX32LN.203 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1348890/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp