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How To Fix Mouse Stutter/Lag in Ubuntu 22.04.1 LTS with Nvidia Drivers and KDE

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In this guide, we will walk you through the process of resolving mouse stutter or lag issues in Ubuntu 22.04.1 LTS with Nvidia drivers and KDE. This is a common problem faced by many users, but with the right steps, it can be resolved.

Update Nvidia drivers

The first step in resolving this issue is to ensure that you have the latest Nvidia drivers installed. Outdated drivers can often cause performance issues, including mouse lag. You can update your Nvidia drivers using the following command:

sudo apt update && sudo apt upgrade

This command will update your system’s package list and upgrade all upgradable packages, including the Nvidia drivers.

Adjust Nvidia settings

Next, you should adjust your Nvidia settings. Open the Nvidia settings by typing nvidia-settings in the terminal and press Enter. In the Nvidia settings, try disabling “Flipping” and enabling “Force Full Composition Pipeline”. These settings can help reduce mouse lag.

Try a different mouse and USB port

Sometimes, the issue can be with the mouse or the USB port you are using. Try using a different mouse and plugging it into a different USB port to see if the issue persists.

Disable autosuspend for USB devices

USB autosuspend can sometimes cause issues with mouse performance. To disable autosuspend for all USB devices, you can modify the relevant settings in the power management configuration. Open the terminal and enter the following command:

sudo nano /etc/default/grub

This command will open the GRUB bootloader’s default settings file in a text editor. Find the line that starts with GRUB_CMDLINE_LINUX_DEFAULT and add usbcore.autosuspend=-1 to the end of the line, before the closing quote. Save and exit the file, then update GRUB with the following command:

sudo update-grub

This will apply the changes you made to the GRUB configuration.

Check system resources

Monitor your system’s CPU, memory, and disk I/O usage to ensure that they are not causing the mouse lag. You can use the top command in the terminal to monitor these resources.

Investigate KDE compositor and Steam app conflict

If you are running Steam apps with Proton, there might be a conflict with the KDE compositor that is causing the mouse lag. To identify if this is the issue, run a windowed Steam app and check the Xorg.0.log for any SYN_DROPPED events. If you find any, you can try forcing the compositor to disable when running anything from Steam.

To do this, open the “Window Rules – System Settings” and create a new rule. Add the properties “Window Class (application) -> Regular Expression -> steam_app.*” and “Block compositing -> Force -> yes”. This will disable the compositor whenever a Steam app is running, potentially resolving the mouse lag issue.

Conclusion

Resolving mouse lag issues in Ubuntu 22.04.1 LTS with Nvidia drivers and KDE can be a complex process, but with the right steps, it is possible. By following this guide, you should be able to significantly reduce or completely eliminate the mouse lag you are experiencing. If you continue to experience issues, consider reaching out to the Ubuntu community for further assistance.

Remember, the key to resolving such issues is patience and a methodical approach. Good luck!

How do I check which version of Nvidia drivers I have installed?

You can check the version of Nvidia drivers installed on your system by running the following command in the terminal: nvidia-smi

How can I revert back to the previous version of Nvidia drivers?

To revert back to the previous version of Nvidia drivers, you can use the following command in the terminal: sudo apt-get install --reinstall nvidia-driver-<version>. Replace <version> with the specific version number you want to install.

How do I open the Nvidia settings in KDE?

You can open the Nvidia settings in KDE by typing nvidia-settings in the terminal and pressing Enter.

Can I use these steps to fix mouse lag in other versions of Ubuntu?

While these steps are specifically tailored for Ubuntu 22.04.1 LTS with Nvidia drivers and KDE, some of the steps may be applicable to other versions of Ubuntu as well. However, it is recommended to consult the documentation or community support for your specific version of Ubuntu for the most accurate instructions.

What if I don’t have the `nvidia-settings` command?

If you don’t have the nvidia-settings command installed, you can install it using the following command: sudo apt-get install nvidia-settings. This will install the Nvidia settings tool on your system.

Will disabling autosuspend for USB devices have any other impact on my system?

Disabling autosuspend for USB devices will prevent them from entering a low-power mode when idle, which can potentially affect the power consumption of your system. However, it should not have any significant impact on the overall performance or functionality of your system.

How can I monitor system resources using the `top` command?

To monitor system resources using the top command, simply open the terminal and type top followed by Enter. This will display a real-time overview of the CPU usage, memory usage, and disk I/O statistics. You can press ‘q’ to exit the top command.

How can I access the Xorg.0.log file?

The Xorg.0.log file is usually located in the /var/log/ directory. You can access it by opening the terminal and running the following command: sudo nano /var/log/Xorg.0.log. This will open the Xorg.0.log file in the nano text editor.

How can I reach out to the Ubuntu community for further assistance?

If you need further assistance or have specific questions related to Ubuntu, you can visit the official Ubuntu website or community forums. There are also various online communities and forums where you can seek help from experienced Ubuntu users and developers.

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