Looking back at your last comment, this sounds like the core of the issue is that there are two interfaces present that are trying to control brightness. Could you try booting with the kernel boot parameter of "acpi_backlight=vendor" which should disable acpi_video0 leaving intel_backlight. Does this improve the issue, or cause additional problems? Also, now that I've set a package please run "apport-collect bug#" so that any logs that may be relevant get attached here. If "acpi_backlight=vendor" either doesn't help, or causes weird flickery issues, there are a few other ways to try to cut the number of interfaces down to one.
Quinn Balazs ** Package changed: ubuntu => linux (Ubuntu) -- 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/1218547 Title: Clevo W350ST brightness keys don't work on Kubuntu Status in “linux” package in Ubuntu: Confirmed Bug description: The Fn+F8 and Fn+F9 keys are not working on my Clevo W350ST with Kubuntu Raring to change screen brightness of the internal laptop screen. I installed linux-headers-3.11.0-4, linux- headers-3.11.0-4-generic, linux-image-3.11.0-4-generic and linux- image-extra-3.11.0-4-generic from Saucy packages repository but the problem persists. When trying: $ xev | sed -n 's/^.*state \([0-9].*\), keycode *\([0-9]\+\) *\(.*\), .*$/keycode \2 = \3, state = \1/p' keycode 36 = (keysym 0xff0d, Return), state = 0x10 keycode 232 = (keysym 0x1008ff03, XF86MonBrightnessDown), state = 0x10 keycode 233 = (keysym 0x1008ff02, XF86MonBrightnessUp), state = 0x10 Event codes appear correctly. And changing: /sys/class/backlight/intel_backlight/brightness changes the brightness of the screen, but pressing the key combination does not. I believe this happens because the key combination is, in fact, changing the value of /sys/class/backlight/acpi_video0/brightness I have http://ppa.launchpad.net/xorg-edgers/ppa/ubuntu http://ppa.launchpad.net/bumblebee/stable/ubuntu in my package sources Thanks! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1218547/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
