use nvidia-smi to gate zink

Author: thelamer

root/defaults/startwm.sh

@@ -42,15 +42,8 @@ if [ ! -f "${STARTUP_FILE}" ]; then
   chmod +x $STARTUP_FILE
 fi
 
-# Check for any render nodes
-for node in /dev/dri/renderD*; do
-    if [ -e "$node" ]; then
-        render_node_exists=true
-        break
-    fi
-done
-# Enable Zink support if detected
-if [ "$render_node_exists" = true ] && [ "${DISABLE_ZINK}" == "false" ]; then
+# Enable Nvidia GPU support if detected
+if which nvidia-smi && [ "${DISABLE_ZINK}" == "false" ]; then
   export LIBGL_KOPPER_DRI2=1
   export MESA_LOADER_DRIVER_OVERRIDE=zink
   export GALLIUM_DRIVER=zink