If the issue is a graphical issue, there are several possibilities that could be causing the problem. Here are some potential causes and solutions:

1. Video driver issue: Check if the video driver on your system is up-to-date. You can do this by going to the "Additional Drivers" or "Software & Updates" settings in Ubuntu and selecting the latest available video driver. If this does not work, you can try installing a different video driver or rolling back to a previous version.

2. Resolution and refresh rate issue: Check if the resolution and refresh rate settings of your display are correctly configured. You can do this by going to the "Displays" settings in Ubuntu and selecting the appropriate resolution and refresh rate for your display. If the issue persists, try changing to a different resolution or refresh rate.

3. Graphics card issue: Check if your graphics card is functioning correctly. You can do this by running graphics card stress tests, updating the graphics card BIOS, or replacing the graphics card if it is faulty.

4. Malfunctioning hardware: Check if any of the hardware components such as RAM or the hard drive are malfunctioning. You can do this by running hardware diagnostics tools or replacing the faulty hardware components.

5. Third-party software issue: Check if any third-party software or drivers installed on your system are causing the graphical issue. Try uninstalling the software or drivers to see if the issue resolves.

6. Operating system issue: Check if your operating system is malfunctioning. You can do this by running system diagnostics or reinstalling the operating system to see if the issue resolves.

These are some of the possible causes of graphical issues on Ubuntu. If none of these solutions work, it may be necessary to consult a professional technician for further assistance.
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