diff --git a/etc/default/grub.d/sedric.cfg b/etc/default/grub.d/sedric.cfg
index fbd09832..a7730222 100644
--- a/etc/default/grub.d/sedric.cfg
+++ b/etc/default/grub.d/sedric.cfg
@@ -1,4 +1,4 @@
 # `acpi_osi=` fixes hardware buttons on ASUS X550JX. Specifying
 # `acpi_osi=Linux` removes some warnings from boot, but breaks hardware keys
-# again.
+# again. `acpi_backlight=vendor` appears to not have any effect.
 GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT acpi_osi="