Testing with 4.5-rc1 results: /sys/class/backlight/acpi_video0/ appeared. Brightness changes if i echo the value to /sys/class/backlight/acpi_video0/brightness
Tracked it down to this kernel.org bug report: https://bugzilla.kernel.org/show_bug.cgi?id=108971 It seems to be exactly the same issue. For now I added kernel parameter acpi_backlight=video to grub config and changed backlight control interface in xorg.conf to acpi_video0. Works fine. ** Bug watch added: Linux Kernel Bug Tracker #108971 http://bugzilla.kernel.org/show_bug.cgi?id=108971 ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1537324 Title: No brightness control on Samsung NP530U4E-K01RU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1537324/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
