Found a workaround for the 5810T: Add the following to the GRUB_CMD_LINUX_DEFAULT entry in /etc/default/grub: acpi_backlight=vendor
-- Screen brightness does not function on Acer Aspire Timeline 5810TZ https://bugs.launchpad.net/bugs/438537 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
