I've searched everywhere for a solution.
I've tried this:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pcie_aspm=force acpi_backlight=vendor acpi_osi="
each variable on it's own and different combinations. Also
In all of them fn+f5 and fn+f6 (for brighness) fn+f2 (for airplane mode) doesn't work. They don't even register in