Mario, from your comment #5, it sounds to me like the problem may be due to there being two /sys/class/backlight interfaces present (acpi_video0 and intel_backlight). Mario & Daniel, you might try booting with the kernel boot parameter "acpi_backlight=vendor" which should disable acpi_video0 leaving only intel_backlight. Does that improve any of the behaviors you're seeing (or make them worse)?
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/954661 Title: backlight brightness not adjustable by default on Dell XPS 13 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/954661/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
