diff --git a/docs/DellLatitude7490.txt b/docs/DellLatitude7490.txt
index 30e3714..3ce7b96 100644
--- a/docs/DellLatitude7490.txt
+++ b/docs/DellLatitude7490.txt
@@ -24,6 +24,7 @@ have been:
   - Using Fedora instead of Debian: FAILED
   - Adding i915.modeset=0 to the boot line: FAILED
   - Adding acpi_osi='Windows 2018' to the boot line: TESTING
+  - Adding i915.enable_dc=0 to the boot line: TESTING
 
 Currently the "acpi_osi='Windows 2018'" kernel option seems to be
 working.