Fix bug preventing input after the first startup of the container

Xorg was starting before udev could finish the monitor command. This prevented the X server from having access to the input devices. For some reason, any subsequent starts would be fine.

Adding a small delay to the X server start and triggering a request for device events from the kernel after a delay seems to fix this issue.

overlay/usr/bin/common-functions.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+###
+# File: common-functions.sh
+# Project: bin
+# File Created: Tuesday, 6th October 2022 9:30:00 pm
+# Author: Josh.5 (jsunnex@gmail.com)
+# -----
+# Last Modified: Tuesday, 6th October 2022 9:30:00 pm
+# Modified By: Josh.5 (jsunnex@gmail.com)
+###
+
+wait_for_x() {
+    # Wait for X server to start
+    #   (Credit: https://gist.github.com/tullmann/476cc71169295d5c3fe6)
+    MAX=60 # About 30 seconds
+    CT=0
+    while ! xdpyinfo >/dev/null 2>&1; do
+        sleep 0.50s
+        CT=$(( CT + 1 ))
+        if [ "$CT" -ge "$MAX" ]; then
+            LOG "FATAL: $0: Gave up waiting for X server $DISPLAY"
+            exit 11
+        fi
+    done
+}