webghostx · June 17, 2024 15:13 · Jun 17, 2024
diff --git a/prevent_hdmi_sleep.md b/prevent_hdmi_sleep.md
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+### Deactivating HDMI Power Saving Mode on Lubuntu
+
+This guide demonstrates how to disable the HDMI power saving mode on Lubuntu and automatically execute a script during system startup to ensure the screen remains active.
+
+#### Step 1: Creating the Bash Script
+
+1. Open a terminal.
+
+2. Create a Bash script named `prevent_hdmi_sleep.sh`:
+
+   ```
+   nano ~/prevent_hdmi_sleep.sh
+   ```
+
+3. Add the following content:
+
+   ```bash
+   #!/bin/bash
+
+   # Disable HDMI power saving mode
+   xset -display :0.0 dpms 0 0 0
+   ```
+
+4. Save the script (Ctrl + O in Nano) and exit the editor (Ctrl + X).
+
+5. Make the script executable:
+
+   ```
+   chmod +x ~/prevent_hdmi_sleep.sh
+   ```
+
+#### Step 2: Creating the Desktop Entry for Autostart with a Variable
+
+1. Open the autostart directory:
+
+   ```
+   mkdir -p ~/.config/autostart/
+   ```
+
+2. Create a new desktop file `prevent_hdmi_sleep.desktop` in the autostart directory:
+
+   ```
+   nano ~/.config/autostart/prevent_hdmi_sleep.desktop
+   ```
+
+3. Add the following content:
+
+   ```ini
+   [Desktop Entry]
+   Type=Application
+   Exec=sh -c "sleep 5 && $HOME/prevent_hdmi_sleep.sh"
+   Hidden=false
+   NoDisplay=false
+   X-GNOME-Autostart-enabled=true
+   Name=Prevent HDMI Sleep
+   Comment=Prevents HDMI power saving mode.
+   ```
+
+   - `Exec=sh -c "sleep 5 && $HOME/prevent_hdmi_sleep.sh"`: This line executes the script located in the user's home directory (`$HOME`). Using `sh -c "sleep 5 && ..."` ensures the script runs with a slight delay after desktop startup (in this case, 5 seconds).
+
+4. Save the file (Ctrl + O in Nano) and exit the editor (Ctrl + X).
+
+#### Step 3: Verification and Testing
+
+1. Ensure the script and the `.desktop` file are correctly created and configured:
+
+   ```bash
+   ls -l ~/prevent_hdmi_sleep.sh
+   ls -l ~/.config/autostart/prevent_hdmi_sleep.desktop
+   cat ~/.config/autostart/prevent_hdmi_sleep.desktop
+   ```
+
+2. Restart your Lubuntu system and verify if the HDMI screen remains active and does not enter standby mode.
+
+3. After restarting, check the DPMS settings again to ensure Standby, Suspend, and Off are set to 0:
+
+   ```bash
+   xset -display :0.0 q
+   ```
+
+   Ensure the values now appear as follows:
+
+   ```
+   DPMS (Energy Star):
+     Standby: 0
+     Suspend: 0
+     Off: 0
+     ...
+   ```
+
+This guide provides a reliable method to deactivate the HDMI power saving mode on Lubuntu and ensure the settings persist after system restarts.