From 6b792dbe234cb3c3cf3244d7e1cf6eb4d184b8fd Mon Sep 17 00:00:00 2001
From: notcarbide <luis@0k.cx>
Date: Sun, 21 Nov 2021 03:40:25 -0500
Subject: [PATCH] install: Allow the kernel to tune the ondemand cpufreq driver

The raspi-config init.d script will overwrite kernel tuning on
boot in RasPiOS. Now that these tunings are set in-kernel (with
some adjustemnts), stop this script from overwriting it.

Signed-off-by: notcarbide <luis@0k.cx>
---
 install.sh | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/install.sh b/install.sh
index f8f069fdca39f..4da8f29761642 100755
--- a/install.sh
+++ b/install.sh
@@ -44,5 +44,21 @@ echo "Installing kernel to $BOOT_DIR & modules to $LIB_DIR..."
 cp -r boot/. "$BOOT_DIR" || (echo "Failed to install in $BOOT_DIR" && exit 1)
 cp -r lib/. "$LIB_DIR" || (echo "Failed to install in $LIB_DIR" && exit 1)
 
+# comment out raspi-config ondemand tuning
+if [ -f /etc/init.d/raspi-config ]; then
+  if [ ! -f /etc/init.d/.raspi-config ]; then
+    echo
+    echo "Backing up old raspi-config as /etc/init.d/.raspi-config..."
+    cp /etc/init.d/raspi-config /etc/init.d/.raspi-config
+    echo "To restore, run:"
+    echo "  sudo cp /etc/init.d/.raspi-config /etc/init.d/raspi-config"
+  fi
+  echo
+  echo "Commenting out RasPiOS changes to ondemand cpufreq governor, if needed..."
+  sed -i '/up_threshold/s/^#*/#/' /etc/init.d/raspi-config
+  sed -i '/sampling_rate/s/^#*/#/' /etc/init.d/raspi-config
+  sed -i '/sampling_down_factor/s/^#*/#/' /etc/init.d/raspi-config
+fi
+
 echo
 echo "Installation successful. Reboot for changes to take effect."