diff --git a/microsoft/surface-pro/9/README.md b/microsoft/surface-pro/9/README.md
new file mode 100644
index 0000000..5ec8e80
--- /dev/null
+++ b/microsoft/surface-pro/9/README.md
@@ -0,0 +1,7 @@
+# Microsoft Surface Pro 9
+
+## Note on Intel Panel Self Refresh (PSR)
+
+Intel GPUs support a feature called [Panel Self Refresh (PSR)](https://www.intel.com/content/www/us/en/support/articles/000057194/graphics.html), where the display refreshes independently of the OS. Out of the box, this can cause lots of display lag, stuttering, and enormous refresh rate drops.
+
+This configuration disables PSR by adding `i915.enable_psr=0` to the kernel boot parameters, at the cost of some battery life. If you want to turn PSR back on, add `i915.enable_psr=1` to your `boot.kernelParams`.