Use QGIS logo as thumbnail

Oct 13, 2025 by talynt.org 56 views

Introduction

Are you experiencing an issue where the QGIS logo appears instead of the thumbnail of a photo in Lubuntu 24.04? This problem can be frustrating, especially when you're trying to organize your files or preview images. In this article, we'll explore the possible reasons behind this issue and provide a step-by-step guide on how to fix it.

Understanding the Issue

The QGIS logo appearing instead of the thumbnail of a photo is a known issue in Lubuntu, particularly in the PCManFM-Qt file manager. This problem has been reported by several users, including yourself, who have experienced it in both Lubuntu 20.04 and 24.04. The issue is not specific to a particular version of Lubuntu, but rather a recurring problem that needs to be addressed.

Possible Causes

Before we dive into the solution, let's explore the possible causes of this issue:

QGIS installation: The QGIS logo appearing instead of the thumbnail of a photo might be related to the installation of QGIS on your system. If QGIS is installed, it's possible that the file manager is using the QGIS logo as a default thumbnail.
File manager settings: The file manager settings might be configured to use the QGIS logo as a thumbnail. This could be due to a misconfiguration or a bug in the file manager.
Thumbnail generation: The thumbnail generation process might be faulty, leading to the QGIS logo appearing instead of the actual thumbnail.

Fixing the Issue

To fix the issue, follow these steps:

Step 1: Uninstall QGIS

If you have QGIS installed on your system, try uninstalling it to see if it resolves the issue.

sudo apt remove qgis

Step 2: Reset PCManFM-Qt Settings

Resetting the PCManFM-Qt settings might resolve the issue. To do this:

Open the PCManFM-Qt file manager.
Go to Edit > Preferences.
Click on Reset to reset the settings to their default values.

Step 3: Reconfigure Thumbnail Generation

Reconfiguring the thumbnail generation process might resolve the issue. To do this:

Open the PCManFM-Qt file manager.
Go to Edit > Preferences.
Click on Thumbnails.
Uncheck the box next to Use QGIS logo as thumbnail.
Click Apply and then OK.

Step 4: Update PCManFM-Qt

Updating PCManFM-Qt to the latest version might resolve the issue. To do this:

Open a terminal.
Run the following command to update PCManFM-Qt:

sudo apt update
sudo apt upgrade pcmanfm-qt

Step 5: Reboot Your System

Rebooting your system might resolve the issue. To do this:

Click on the Power button in the top-right corner of the screen.
Select Restart.

Additional Tips

If the issue persists after trying the above steps, here are some additional tips to help you troubleshoot:

Check for conflicts: Check if there are any conflicts between QGIS and PCManFM-Qt. You can try uninstalling QGIS and then reinstalling it to see if it resolves the issue.
Check file manager logs: Check the file manager logs to see if there are any errors related to thumbnail generation.
Try a different file manager: Try using a different file manager, such as Nautilus or Dolphin, to see if the issue persists.

Conclusion

Introduction

In our previous article, we explored the issue of the QGIS logo appearing instead of the thumbnail of a photo in Lubuntu 24.04. We provided a step-by-step guide on how to fix the issue and offered additional tips to help you troubleshoot. In this article, we'll answer some of the most frequently asked questions related to this issue.

Q: What causes the QGIS logo to appear instead of the thumbnail of a photo?

A: The QGIS logo appearing instead of the thumbnail of a photo can be caused by a variety of factors, including:

QGIS installation: If QGIS is installed on your system, it's possible that the file manager is using the QGIS logo as a default thumbnail.
File manager settings: The file manager settings might be configured to use the QGIS logo as a thumbnail. This could be due to a misconfiguration or a bug in the file manager.
Thumbnail generation: The thumbnail generation process might be faulty, leading to the QGIS logo appearing instead of the actual thumbnail.

Q: How do I fix the issue of the QGIS logo appearing instead of the thumbnail of a photo?

A: To fix the issue, follow these steps:

Uninstall QGIS: Try uninstalling QGIS to see if it resolves the issue.
Reset PCManFM-Qt settings: Reset the PCManFM-Qt settings to their default values.
Reconfigure thumbnail generation: Reconfigure the thumbnail generation process to use the actual thumbnail instead of the QGIS logo.
Update PCManFM-Qt: Update PCManFM-Qt to the latest version.
Reboot your system: Reboot your system to apply the changes.

Q: Why does the issue persist even after trying the above steps?

A: If the issue persists even after trying the above steps, it's possible that there are conflicts between QGIS and PCManFM-Qt. You can try uninstalling QGIS and then reinstalling it to see if it resolves the issue. Additionally, you can check the file manager logs to see if there are any errors related to thumbnail generation.

Q: Can I use a different file manager to resolve the issue?

A: Yes, you can try using a different file manager, such as Nautilus or Dolphin, to see if the issue persists. This can help you determine if the issue is specific to PCManFM-Qt or if it's a more general problem.

Q: Are there any known issues with PCManFM-Qt that could be causing this problem?

A: Yes, there are known issues with PCManFM-Qt that could be causing this problem. For example, some users have reported issues with thumbnail generation in PCManFM-Qt. You can try updating PCManFM-Qt to the latest version to see if it resolves the issue.

Q: Can I prevent the QGIS logo from appearing instead of the thumbnail of a photo in the future?

A: Yes, you can prevent the QGIS logo from appearing instead of the thumbnail of a photo in the future by following these steps:

Uninstall QGIS: Uninstall QGIS to prevent it from interfering with the thumbnail generation process.
Reset PCManFM-Qt settings: Reset the PCManFM-Qt settings to their default values.
Reconfigure thumbnail generation: Reconfigure the thumbnail generation process to use the actual thumbnail instead of the QGIS logo.

Conclusion

The QGIS logo appearing instead of the thumbnail of a photo in Lubuntu 24.04 is a known issue that can be frustrating to deal with. By following the steps outlined in this article, you should be able to fix the issue and get your thumbnails displaying correctly. If the issue persists, try the additional tips provided to help you troubleshoot.