From 1af5ef15469a55bef1a9136324437e4ddede2c5c Mon Sep 17 00:00:00 2001
From: Andre <andre@8bitbuddhism.com>
Date: Sun, 12 May 2024 12:00:44 -0400
Subject: [PATCH] Add Readme for Surface Pro 9

---
 microsoft/surface-pro/9/README.md | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 microsoft/surface-pro/9/README.md

diff --git a/microsoft/surface-pro/9/README.md b/microsoft/surface-pro/9/README.md
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+# 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`.