diff --git a/POSTINSTALL-README.md b/POSTINSTALL-README.md
index 707f8a4..b12616c 100644
--- a/POSTINSTALL-README.md
+++ b/POSTINSTALL-README.md
@@ -13,7 +13,8 @@ If you are using an nvidia image, run this after installation:
 rpm-ostree kargs \
     --append-if-missing=rd.driver.blacklist=nouveau \
     --append-if-missing=modprobe.blacklist=nouveau \
-    --append-if-missing=nvidia-drm.modeset=1
+    --append-if-missing=nvidia-drm.modeset=1 \
+    --append-if-missing=initcall_blacklist=simpledrm_platform_driver_init
 ```
 
 ### Nvidia optimus laptop