Hi! Ok, here are my results: "ls /sys/class/backlight" without extra boot parameters: "acpi_video0 acpi_video1 intel_backlight"
ls /sys/class/backlight with "acpi_backlight=vendor" boot parameter: "acer-wmi intel_backlight" AND backlight control WORKS! I also tried kernel linux-image-3.4.0-030400rc1-generic_3.4.0-030400rc1.201203312035_amd64 with no extra bootparams but backlight control did not work there. ** Tags removed: needs-upstream-testing -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/882506 Title: Brightness control broken on Acer TimelineX 3820TG using Intel IGP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/882506/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
