Ubuntu 22.04.4 LTS pixelated screen

Experiencing a pixelated screen on Ubuntu can be caused by various factors, including graphics driver issues, hardware compatibility, or configuration problems. Here are some general steps you can try to troubleshoot and resolve the pixelation issue:

Update Graphics Drivers:
Ensure that your graphics drivers are up to date. You can use the following commands in the terminal to update your graphics drivers:

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sudo apt update
sudo apt upgrade
Additionally, for NVIDIA graphics cards, you might want to install the proprietary drivers using:

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sudo ubuntu-drivers autoinstall
Check for Hardware Compatibility:
Verify that your hardware is fully compatible with the Ubuntu version you're using. Sometimes, certain graphics cards or components may have issues with specific Ubuntu releases.

Adjust Screen Resolution:
Try adjusting the screen resolution in Ubuntu settings to see if it resolves the pixelation. You can do this through the System Settings or by using the xrandr command in the terminal.

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xrandr
Identify the available resolutions and set the appropriate one:

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xrandr --output <your_output> --mode <desired_resolution>
Check Desktop Environment:
If you're using a desktop environment like GNOME or KDE, there might be specific settings related to graphics rendering. Explore the settings menu for your desktop environment to see if there are any options that could be causing the issue.

Kernel Parameters:
Experiment with kernel parameters during boot. You can do this by editing the GRUB configuration:

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sudo nano /etc/default/grub
Add or modify the following line to experiment with different parameters:

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GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
After making changes, run:

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sudo update-grub
Then, restart your system.

Check for Bug Reports:
Search online forums and bug tracking systems to see if others have encountered similar issues. Sometimes, there might be specific bug reports or community discussions that provide solutions.

Try a Different Desktop Environment:
If the issue persists, consider trying a different desktop environment to see if the problem is specific to your current one. For example, you can install a lightweight environment like XFCE or LXQt and switch to it at the login screen.

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sudo apt install xubuntu-desktop
After installation, log out, and on the login screen, you can choose your desktop environment.

Remember to back up important data before making significant changes to your system. If the issue persists, you may need to seek help from the Ubuntu community forums or submit a bug report with detailed information about your hardware and the issue you're facing.