update: I tried the v3.13-rc5 kernel from the mainline. Without the workaround acpi_backlight=vendor the adjusting of backlight does not work. In the other hand, the application of workaround at the v3.13-rc5 kernel produces blackscreen at startup of the OS.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1261853 Title: 8086:0166 [Dell Inspiron 15R 5521] Impossible to adjust the screen backlight To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1261853/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
