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How To Softreset Your GPU Without Rebooting on Ubuntu

Ubuntu 3

In this guide, we will be discussing various methods on how to soft reset your GPU on Ubuntu without having to reboot your system. This can be particularly useful in situations where you’re experiencing graphical issues and want to avoid a full system restart.

Quick Answer

Yes, it is possible to soft reset your GPU without rebooting on Ubuntu. You can restart LightDM, switch between the graphic screen and virtual TTY, use a sleep script, or a GPU reset script to achieve this. However, the effectiveness of these methods may vary depending on your hardware configuration.

1. Restarting LightDM

LightDM is a cross-desktop display manager whose aim is to be the standard display manager for the X server. One of the easiest ways to soft reset your GPU is by restarting LightDM. To do this, open your terminal (Ctrl+Alt+T) and run one of the following commands:

sudo /etc/init.d/lightdm restart

or

sudo service lightdm restart

These commands will restart your graphics environment. However, be warned that this method may close all your currently running programs.

2. Switching Between Graphic Screen and Virtual TTY

If you’re facing a black screen, you can attempt to switch to a virtual tty by pressing Ctrl+Alt+F1. If you’re greeted with a login screen, you can switch back to your graphical screen by pressing Alt+F7. However, if your graphical screen doesn’t reappear, this method may not be suitable for your situation.

3. Using a Sleep Script

Another method to soft reset your GPU is by using a sleep script. This involves creating a script file in the /etc/pm/sleep.d/ directory. Here’s how you can do it:

First, create a file named 99_vthack in the /etc/pm/sleep.d/ directory with the following content:

#!/bin/sh

case "${1}" in
 hibernate|suspend)
 chvt 1 
 ;;
 resume|thaw)
 chvt 7
 ;;
esac

Here, chvt 1 and chvt 7 are used to switch between the virtual console and the graphical screen. The ${1} parameter is a positional parameter that refers to the first argument that was passed to the script, which can be either hibernate, suspend, resume, or thaw.

After creating the file, make it executable by running:

sudo chmod 755 /etc/pm/sleep.d/99_vthack

This command changes the file permissions of 99_vthack to 755, which means the file owner can read, write, and execute the file, while others can only read and execute it.

This script is executed at the end of the resume sequence and can potentially fix the black screen issue after waking from suspend mode. However, the effectiveness of this method can vary based on your hardware configuration.

4. Using a GPU Reset Script

Another method to soft reset your GPU is by using a GPU reset script. To do this, you will need to install the scriptechocolor package and use the secFixScreen.sh script provided. You can then bind a key combination (e.g., Shift+Ctrl+Alt+F) to start the script. The script will attempt to change between all possible screen resolutions and may open a new X session to force a workaround. Press Ctrl+C to stop the script when the screen is fixed.

In conclusion, these methods provide various ways to soft reset your GPU without having to reboot your Ubuntu system. Remember, these solutions may not work for all systems and hardware configurations. It’s recommended to try them one by one and see which one works best for your specific setup.

Can I soft reset my GPU without rebooting on Ubuntu?

Yes, there are several methods you can try to soft reset your GPU without rebooting on Ubuntu. Refer to the guide above for detailed instructions.

What is LightDM?

LightDM is a cross-desktop display manager for the X server. It is responsible for managing graphical logins and starts the display server and greeter for the login screen.

Will restarting LightDM close all my running programs?

Yes, restarting LightDM will close all your currently running programs. Make sure to save your work before attempting to restart LightDM.

How can I switch between the graphic screen and virtual TTY?

To switch to a virtual TTY, press Ctrl+Alt+F1. To switch back to your graphical screen, press Alt+F7. Note that this method may not work in all situations.

What is a sleep script and how does it help in soft resetting the GPU?

A sleep script is a script file that is executed at the end of the resume sequence after waking from suspend mode. It can potentially fix the black screen issue by switching between the virtual console and the graphical screen.

How do I create a sleep script on Ubuntu?

To create a sleep script, follow the instructions provided in method 3 of the guide above. The script file should be created in the /etc/pm/sleep.d/ directory and made executable.

What is the purpose of the GPU reset script?

The GPU reset script is designed to attempt to fix graphical issues by cycling through all possible screen resolutions and potentially opening a new X session. It can be useful in situations where other methods fail to resolve the problem.

How do I install the scriptechocolor package for the GPU reset script?

Unfortunately, the specific steps for installing the scriptechocolor package are not provided in the guide. You may need to search for the package and installation instructions on the internet.

Are these methods guaranteed to fix all graphical issues on Ubuntu?

No, these methods may not work for all systems and hardware configurations. It’s recommended to try them one by one and see which one works best for your specific setup. If the issue persists, you may need to seek further assistance or consider other troubleshooting options.

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