This has to do with ACPI. I solved this problem on my Asus Zenbook UX31E (with latest BIOS) this way :
1) I added acpi_osi='!Windows 2012' acpi_backlight=vendor in /etc/default/default so that the line looks like GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi='!Windows 2012' acpi_backlight=vendor" 2) I ran sudo update-grub (to re-generate GRUB conf files) To explain, I forced the kernel to say to the BIOS that Windows 8 is running on the laptop. Maybe something similar should work on other PCs / Macbook. It's a better way to fix this than a workaround such as adding a script to set backlight to a certain level. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/915188 Title: LCD backlight level is reset to maximum after a reboot. To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-settings-daemon/+bug/915188/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
