Add REMOVE_DEVICE flag

Author: michelesr

config/nvidia-xrun

@@ -5,6 +5,14 @@
 # output of lshw.
 ENABLE_PM=1
 
+# When PM is enabled, remove the card from the system after the command exists
+# and modules unload: the card will be readded in the next nvidia-xrun
+# execution before loading the nvidia module again. This is recommended as Xorg
+# and some other programs tend to load the nvidia module if they detect a
+# nvidia card in the system, and when the module is loaded the card can't save
+# power.
+REMOVE_DEVICE=1
+
 # Bus ID of the PCI express controller
 CONTROLLER_BUS_ID=0000:00:01.0
 

nvidia-xrun

@@ -19,8 +19,13 @@ function execute {
 }
 
 function turn_off_gpu {
-  echo 'Removing Nvidia bus from the kernel'
-  execute "sudo tee /sys/bus/pci/devices/${DEVICE_BUS_ID}/remove <<<1"
+  if [[ "$REMOVE_DEVICE" == '1' ]]; then
+    echo 'Removing Nvidia bus from the kernel'
+    execute "sudo tee /sys/bus/pci/devices/${DEVICE_BUS_ID}/remove <<<1"
+  else
+    echo 'Enabling powersave for the graphic card'
+    execute "sudo tee /sys/bus/pci/devices/${DEVICE_BUS_ID}/power/control <<<auto"
+  fi
 
   echo 'Enabling powersave for the PCIe controller'
   execute "sudo tee /sys/bus/pci/devices/${CONTROLLER_BUS_ID}/power/control <<<auto"