Please run "apport-collect 1249219" in order to collect some useful logs.
I think adding the boot flag of "acpi_backlight=vendor" on your next boot should make the values change in /sys/class/backlight/intel_backlight/brightness. ** Package changed: ubuntu => linux (Ubuntu) ** Changed in: linux (Ubuntu) Status: New => 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/1249219 Title: backlight control acpi_video0 instead intel_backlight Status in “linux” package in Ubuntu: Incomplete Bug description: After upgrading to new release (13.10), i got a little bug. When i control brightness, system change value in file /sys/class/backlight/acpi_video0/brightness instead of /sys/class/backlight/intel_backlight/brightness by default How i can fix it? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1249219/+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