diff --git a/README.md b/README.md
index 8b24047..84a1c3d 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,22 @@ A VNC server for DRM/KMS capable GNU/Linux devices.
 The goal is to simply have a universally working vncserver on X, wayland and even something like kmscon.  
 Currently in very early stage.
 
+## Notes
+Intel made a great thing called CCS (Color Control Surface), however that won't work with kmsvnc. Please set `INTEL_DEBUG=noccs` globally, ideally in /etc/systemd/system.conf.d. Manpage is at `man 5 systemd-system.conf`. For example:
+```
+# /etc/systemd/system.conf.d/intel-no-ccs.conf 
+[Manager]
+DefaultEnvironment=INTEL_DEBUG=noccs
+```
+NixOS:
+```
+systemd.extraConfig = ''
+  DefaultEnvironment=INTEL_DEBUG=noccs
+''
+```
+
+If you plan to use the default vaapi driver for Intel and AMD GPUs, please make sure your vaapi configuration is working.
+
 ## Dependencies
  * cmake
  * libvncserver