So, it seems that Asus is somehow sniffing on the installed operating system and acts accordingly. So the way acpi works is related to what OS the mainboard thinks you have. Newer kernels don't advertise themselves, so you should do that manually by adding "acpi_osi=Linux" to /etc/default/grub file to GRUB_CMDLINE_LINUX_DEFAULT variable so it will show like this:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux"
Then run "update-grub" as root or with sudo, reboot, and that's all.