I'm now on Arch and with a very simple installation the error is the same. As soon as acpid is loaded the brightness cannot be changed anymore.
cat /proc/acpi/video/IGD/LCD/info yields following output device_id: 0x0110 type: UNKNOWN known by bios: no -- LCD backlight brightness control only works until boot starts https://bugs.launchpad.net/bugs/279163 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
