Pander, thank you for reporting this and helping make Ubuntu better. Please execute the following command, as it will automatically gather debugging information, in a terminal: apport-collect 1400050
** Package changed: ubuntu => linux (Ubuntu) ** Changed in: linux (Ubuntu) Importance: Undecided => Low ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1400050 Title: Brightness doesn't change anymore in X.Org / GNOME Shell in 14.10 Status in linux package in Ubuntu: Incomplete Bug description: I have no idea to what package this belongs. Please file it under the correct one. Brightness doesn't change anymore in X.Org / GNOME Shell in 14.10. It stays on maximum (10) and sometimes the less brightness down/less key makes it go to 9 or 6. Each time I press the brightness down/less key, the overlay with brightness setting shows up (so the key works. I can set brightness to any level with echo 1 >/sys/class/backlight/acpi_video0/brightness echo 2 >/sys/class/backlight/acpi_video0/brightness ... echo 10 >/sys/class/backlight/acpi_video0/brightness and the display responds properly and I can read out the value with cat /sys/class/backlight/acpi_video0/brightness but changing it with keys only goes from 10 to 9 or 10 to 6. This used to work in older versions of Ubuntu. Please fix this and let me know how I can fix this temporarily. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1400050/+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