Understanding Hibernate and its Importance

Oct 13, 2025 by windailys.com 25 views

Enabling Hibernate on Ubuntu 22.04 LTS: Overcoming the Immediate Wake-Up Issue

As a user of Ubuntu 22.04 LTS on your Lenovo Thinkpad P16 gen2 machine, you're likely aware of the importance of hibernation in extending the battery life of your laptop. However, you've encountered a frustrating issue where your machine shuts down but immediately awakens afterward. This problem can be attributed to various factors, including permissions, hibernate settings, and hardware configurations. In this article, we'll delve into the possible causes and provide step-by-step solutions to enable hibernation on your Ubuntu system.

Understanding Hibernate and its Importance

Hibernate is a power-saving feature that allows your system to save its current state to the hard drive, effectively shutting down the machine while preserving the current session. This feature is particularly useful for laptops, as it enables you to conserve battery life and quickly resume work when needed. However, the reliability of hibernate on your Lenovo Thinkpad P16 gen2 machine, equipped with an nVidia RTX 3500 Ada GPU, might be compromised due to the resume process being too unreliable.

Permissions and Hibernation

One of the primary reasons for the immediate wake-up issue is related to permissions. The hibernate feature requires specific permissions to function correctly. To troubleshoot this issue, you'll need to check the permissions of the hibernate-related files and directories.

Checking Hibernation Permissions

To verify the permissions, open a terminal and run the following commands:

sudo ls -l /sys/power/state
sudo ls -l /sys/power/disk

These commands will display the permissions of the /sys/power/state and /sys/power/disk directories. Ensure that the permissions are set correctly, as follows:

-rw-r--r-- 1 root root 0 Mar  7 14:30 /sys/power/state
-rw-r--r-- 1 root root 0 Mar  7 14:30 /sys/power/disk

If the permissions are not set correctly, you can modify them using the chmod command:

sudo chmod 644 /sys/power/state
sudo chmod 644 /sys/power/disk

Enabling Hibernation

To enable hibernation, you'll need to create a new file in the /etc/polkit-1/localauthority.conf.d directory. This file will define the permissions for the hibernate feature.

Creating a New Policy File

Create a new file named hibernate.conf in the /etc/polkit-1/localauthority.conf.d directory using the following command:

sudo nano /etc/polkit-1/localauthority.conf.d/hibernate.conf

Add the following content to the file:

polkit.addRule(function(action, subject) {
  if (action.id == "org.freedesktop.login1.hibernate" || action.id == "org.freedesktop.login1.hibernate-multiple-sessions") {
    return polkit.Result.YES;
  }
});

Save and close the file. This policy file will grant the necessary permissions for the hibernate feature.

Configuring the Systemd Service

To enable hibernation, you'll need to configure the systemd service to use the hibernate target.

Editing the Systemd Service File

Open the systemd service file using the following command:

sudo nano /etc/systemd/system-sleep/hibernate

Add the following content to the file:

#!/bin/sh
case $1 in
hibernate)
echo "Hibernate mode activated"
;;
suspend)
echo "Suspend mode activated"
;;
thaw)
echo "Thaw mode activated"
;;
freeze)
echo "Freeze mode activated"
;;
poweroff)
echo "Power off mode activated"
;;
*)
echo "Unknown mode activated"
;;
esac

Save and close the file. This script will be executed when the system enters hibernate mode.

Enabling the Systemd Service

To enable the systemd service, run the following command:

sudo systemctl enable hibernate

Restarting the System

To apply the changes, restart your system using the following command:

sudo reboot

Verifying Hibernation

After restarting your system, verify that hibernation is enabled by running the following command:

sudo systemctl status hibernate

This command will display the status of the hibernate service. If everything is set up correctly, you should see a message indicating that the service is active and running.

Troubleshooting the Immediate Wake-Up Issue

If you're still experiencing the immediate wake-up issue, try the following troubleshooting steps:

Check the BIOS settings: Ensure that the BIOS settings are configured correctly for hibernation. Consult your laptop's user manual or manufacturer's website for instructions.
Update the nVidia drivers: Outdated drivers might cause issues with hibernation. Update the nVidia drivers to the latest version using the following command:

sudo apt update sudo apt install nvidia-driver-515

Replace `nvidia-driver-515` with the latest version available. 3. **Disable the nVidia GPU**: Try disabling the nVidia GPU to see if it resolves the issue. You can do this by running the following command: ```bash

sudo echo "blacklist nvidia" >> /etc/modprobe.d/blacklist.conf

Reboot your system and verify if the issue persists.

Check the system logs: Analyze the system logs to identify any errors related to hibernation. You can do this by running the following command:

sudo journalctl -u hibernate


    This command will display the system logs related to the `hibernate` service.
By following these steps, you should be able to enable hibernation on your Ubuntu 22.04 LTS system and resolve the immediate wake-up issue. If you're still experiencing problems, feel free to ask for further assistance.<br/>
Frequently Asked Questions (FAQs) about Enabling Hibernate on Ubuntu 22.04 LTS
As you've learned in the previous article, enabling hibernate on Ubuntu 22.04 LTS can be a bit tricky, but with the right steps, you can overcome the immediate wake-up issue. However, we understand that you might still have some questions or concerns. In this article, we'll address some of the most frequently asked questions about enabling hibernate on Ubuntu 22.04 LTS.
Q: What is the difference between suspend and hibernate?
A: Suspend and hibernate are two different power-saving features in Ubuntu. Suspend puts your system in a low-power state, but it still consumes power. Hibernate, on the other hand, saves the current state of your system to the hard drive and shuts down the machine, preserving the current session.
Q: Why is hibernate not working on my Ubuntu system?
A: There could be several reasons why hibernate is not working on your Ubuntu system. Some common issues include:

Insufficient permissions
Incorrect BIOS settings
Outdated drivers
Systemd service configuration issues

Q: How do I check the permissions of the hibernate-related files and directories?
A: To check the permissions, open a terminal and run the following commands:
sudo ls -l /sys/power/state
sudo ls -l /sys/power/disk
</code></pre>
<p>These commands will display the permissions of the <code>/sys/power/state</code> and <code>/sys/power/disk</code> directories.</p>
<p><strong>Q: How do I modify the permissions of the hibernate-related files and directories?</strong></p>
<p>A: To modify the permissions, use the <code>chmod</code> command:</p>
<pre><code class="hljs">sudo chmod 644 /sys/power/state
sudo chmod 644 /sys/power/disk
</code></pre>
<p><strong>Q: What is the purpose of the <code>hibernate.conf</code> file?</strong></p>
<p>A: The <code>hibernate.conf</code> file is a policy file that defines the permissions for the hibernate feature. It grants the necessary permissions for the hibernate feature to function correctly.</p>
<p><strong>Q: How do I create a new policy file for hibernate?</strong></p>
<p>A: To create a new policy file, run the following command:</p>
<pre><code class="hljs">sudo nano /etc/polkit-1/localauthority.conf.d/hibernate.conf
</code></pre>
<p>Add the following content to the file:</p>
<pre><code class="hljs">polkit.addRule(function(action, subject) {
  if (action.id == &quot;org.freedesktop.login1.hibernate&quot; || action.id == &quot;org.freedesktop.login1.hibernate-multiple-sessions&quot;) {
    return polkit.Result.YES;
  }
});
</code></pre>
<p>Save and close the file.</p>
<p><strong>Q: What is the purpose of the <code>systemd</code> service file?</strong></p>
<p>A: The <code>systemd</code> service file is used to configure the <code>systemd</code> service to use the <code>hibernate</code> target.</p>
<p><strong>Q: How do I edit the <code>systemd</code> service file?</strong></p>
<p>A: To edit the <code>systemd</code> service file, run the following command:</p>
<pre><code class="hljs">sudo nano /etc/systemd/system-sleep/hibernate
</code></pre>
<p>Add the following content to the file:</p>
<pre><code class="hljs">#!/bin/sh

case $1 in
  hibernate)
    echo &quot;Hibernate mode activated&quot;
    ;;
  suspend)
    echo &quot;Suspend mode activated&quot;
    ;;
  thaw)
    echo &quot;Thaw mode activated&quot;
    ;;
  freeze)
    echo &quot;Freeze mode activated&quot;
    ;;
  poweroff)
    echo &quot;Power off mode activated&quot;
    ;;
  *)
    echo &quot;Unknown mode activated&quot;
    ;;
esac
</code></pre>
<p>Save and close the file.</p>
<p><strong>Q: How do I enable the <code>systemd</code> service?</strong></p>
<p>A: To enable the <code>systemd</code> service, run the following command:</p>
<pre><code class="hljs">sudo systemctl enable hibernate
</code></pre>
<p><strong>Q: How do I verify that hibernate is enabled?</strong></p>
<p>A: To verify that hibernate is enabled, run the following command:</p>
<pre><code class="hljs">sudo systemctl status hibernate
</code></pre>
<p>This command will display the status of the <code>hibernate</code> service.</p>
<p><strong>Q: What if I'm still experiencing issues with hibernate?</strong></p>
<p>A: If you're still experiencing issues with hibernate, try the following troubleshooting steps:</p>
<ol>
<li>
<p><strong>Check the BIOS settings</strong>: Ensure that the BIOS settings are configured correctly for hibernation. Consult your laptop's user manual or manufacturer's website for instructions.</p>
</li>
<li>
<p><strong>Update the nVidia drivers</strong>: Outdated drivers might cause issues with hibernation. Update the nVidia drivers to the latest version using the following command:</p>
<pre><code class="hljs"></code></pre>
</li>
</ol>
<p>sudo apt update
sudo apt install nvidia-driver-515</p>
<pre><code class="hljs">
    Replace `nvidia-driver-515` with the latest version available.
3.  **Disable the nVidia GPU**: Try disabling the nVidia GPU to see if it resolves the issue. You can do this by running the following command:

    ```bash
sudo echo &quot;blacklist nvidia&quot; &gt;&gt; /etc/modprobe.d/blacklist.conf
</code></pre>
<pre><code>Reboot your system and verify if the issue persists.
</code></pre>
<ol start="4">
<li>
<p><strong>Check the system logs</strong>: Analyze the system logs to identify any errors related to hibernation. You can do this by running the following command:</p>
<pre><code class="hljs"></code></pre>
</li>
</ol>
<p>sudo journalctl -u hibernate</p>
<pre><code class="hljs">
    This command will display the system logs related to the `hibernate` service.

By following these FAQs, you should be able to overcome any issues you&#39;re experiencing with enabling hibernate on your Ubuntu 22.04 LTS system. If you have any further questions or concerns, feel free to ask for assistance.</code></pre>


                
                    
                        

                    
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